人教版九年级英语寒假作业(四)
人教版2022年九年级“寒假作业”专项练习：04 二次函数定义、图象和性质(含解析)
人教版2022年九年级“寒假作业”专项练习：04 二次函数定义、图象和性质1.二次函数的概念：一般地，自变量x 和因变量y 之间存在如下关系： y=ax 2+bx+c(a≠0，a 、b 、c 为常数)，则称y 为x 的二次函数。
抛物线)0,,(2≠++=a c b a c bx ax y 是常数，叫做二次函数的一般式。
2.二次函数y=ax 2+bx+c(a ≠0)的图像与性质：（1）对称轴：2bx a=-（2）顶点坐标：24(,)24b ac b a a-- （3）与y 轴交点坐标（0，c ） （4）增减性：当a>0时，对称轴左边，y 随x 增大而减小；对称轴右边，y 随x 增大而增大； 当a<0时，对称轴左边，y 随x 增大而增大；对称轴右边，y 随x 增大而减小。
3.二次函数的解析式三种形式：（1）一般式：y=ax 2 +bx+c (a≠0).已知图像上三点或三对x 、y 的值，通常选择一般式； （2）顶点式：2()y a x h k =-+224()24b ac b y a x a a -=-+.已知图像的顶点或对称轴，通常选择顶点式；（3）交点式：12()()y a x x x x =--.已知图像与x 轴的交点坐标1x 、2x ，通常选用交点式。
4．根据图像判断a,b,c 的符号：（1）a 确定开口方向 ：当a>0时，抛物线的开口向上；当a<0时，抛物线的开口向下。
（2）b ——对称轴与a 左同右异。
（3）抛物线与y 轴交点坐标（0，c ）yxO一．选择题（共7小题）1．下列函数中，是二次函数的是（）A．y＝2x﹣1B．y＝C．y＝2x2﹣1D．y＝2x3﹣12．二次函数y＝x2+2x+1的常数项是（）A．1B．2C．﹣1D．03．抛物线y＝x2+4x﹣1的顶点坐标向上平移一个单位后，再向右平移一个单位后的坐标为（）A．（4，﹣1）B．（2，﹣1）C．（﹣1，﹣4）D．（1，﹣4）4．下列对二次函数y＝﹣x2+2x的图象的描述，正确的是（）A．当x＞0时，y随x的增大而增大B．对称轴是y轴C．经过点（m﹣1，﹣m2+1）D．有最小值5．直线y＝ax+b与抛物线y＝ax2+bx+2在同一平面直角坐标系中的图象可能是（）A．B．C．D．6．已知A（﹣，y1），B（，y2），C（﹣，y3）是二次函数y＝﹣x2+4x﹣k的图象上的三点，则y1，y2，y3的大小关系是（）A．y1＝y2＞y3B．y2＞y1＞y3C．y2＞y3＞y1D．y3＞y1＞y27．二次函数y＝ax2+bx+c（a≠0）的图象如图所示，对称轴为x＝﹣1，则下列结论：①abc＞0，②a+b＜﹣c，③4d﹣2b+c＞0，④3b+2c＜0，⑤a﹣b＞m（am+b）（其中m为任意实数）．中正确的个数是（）8．已知y＝+2x﹣3是二次函数式，则m的值为．9．二次函数y＝（x+4）2﹣1的顶点坐标是．10．已知抛物线y＝﹣（x+2）2，当x时，y随x的增大而增大；当x时，y随x的增大而减小．11．已知二次函数y＝x2+2x﹣3，当﹣3＜x＜1时，函数值y的取值范围为．12．如图，抛物线y＝ax2+bx+4经过点A（﹣3，0），点B在抛物线上，CB∥x轴，且AB平分∠CAO，则此抛物线的解析式是．三．解答题（共6小题）13．求抛物线y＝﹣x2+4x+5的开口方向、对称轴、顶点坐标．14．如图，已知抛物线y＝﹣x2+mx+3经过点M（﹣2，3）．（1）求m的值，并求出此抛物线的顶点坐标；（2）当﹣3≤x≤0时，直接写出y的取值范围．15．已知抛物线L：y＝（m﹣2）x2+x﹣2m（m是常数且m≠2）．（1）若抛物线L有最低点，求m的取值范围；（2）若抛物线L与抛物线y＝x2的形状相同，开口方向相反，求m的值．16．如图，二次函数y＝﹣x2+4x+k的图象经过A（2，0），与y轴交于点B．（1）求点B的坐标；（2）设该二次函数的对称轴与x轴交于点C，连接BA，BC，求△ABC的面积．17．如图，抛物线y＝﹣x2+bx+c交y轴于点C（0，2），交x轴于点A（﹣3，0）和点B（点A在点B的左侧）．（1）求该抛物线的函数表达式；（2）在抛物线的对称轴上是否存在点P，使点A、B、P构成的三角形是以AB为斜边的直角三角形？若存在，请求出点P的坐标；若不存在，请说明理由．18．综合与探究：如图，在平面直角坐标系中，二次函数y＝x2+bx+c的图象经过点，点．（1）求此二次函数的解析式；（2）当﹣2≤x≤2时，求二次函数y＝x2+bx+c的最大值和最小值；（3）点P为此函数图象上任意一点，其横坐标为m，过点P作PQ∥x轴，点Q的横坐标为﹣2m+1．已知点P 与点Q不重合，且线段PQ的长度随m的增大而减小．求m的取值范围；参考答案一．选择题（共7小题）1．【解答】解：A、y＝2x﹣1是一次函数，不符合题意；B、y＝是反比例函数，不符合题意；C、y＝2x2﹣1是二次函数，符合题意；D、y＝2x3﹣1是三次函数，不符合题意．故选：C．2．【解答】解：二次函数y＝x2+2x+1的常数项是1．故选：A．3．【解答】解：y＝x2+4x﹣1＝（x+2）2﹣5，即抛物线的顶点坐标为（﹣2，﹣5），把点（﹣2，﹣5）向上平移一个单位后，再向右平移一个单位后的坐标为（﹣1，﹣4）．故选：C．4．【解答】解：∵二次函数y＝﹣x2+2x＝﹣（x﹣1）2+1，a＝﹣1，∴该函数图象开口向下，对称轴为直线x＝1，顶点坐标为（1，1），当x＝1时，y有最大值1，∴选项A、B、D不符合题意；∵当x＝m﹣1时，y＝﹣（m﹣1）2+2（m﹣1）＝﹣m2+1，∴图象经过点（m﹣1，﹣m2+1），故选项C符合题意．故选：C．5．【解答】解：A、∵二次函数图象开口向上，对称轴在y轴右侧，∴a＞0，b＜0，∴一次函数图象应该过第一、三、四象限，A错误；B、∵二次函数图象开口向上，对称轴在y轴左侧，∴a＞0，b＞0，∴一次函数图象应该过第一、二、三象限，B正确；C、∵二次函数图象开口向下，对称轴在y轴左侧，∴a＜0，b＜0，∴一次函数图象应该过第二、三、四象限，C正确；D、∵二次函数图象开口向下，对称轴在y轴右侧，故选：B．6．【解答】解：∵y＝﹣x2+4x﹣k，∴抛物线开口向下，对称轴为直线x＝﹣＝2，∴x＜2时，y随x增大而增大，∵﹣＜﹣＜＜2，∴y1＜y3＜y2，故选：C．7．【解答】解：∵开口向下，∴a＜0，∵抛物线和y轴的正半轴相交，∴c＞0，∵对称轴为x＝﹣＝﹣1，∴b＝2a＜0，∴abc＞0，故①正确；当x＝1时，y＜0，则a+b+c＜0，∴a+b＜﹣c，故②正确；由图象可知，当x＝﹣2时，y＞0，∴4a﹣2b+c＞0，故③正确；∵当x＝1时，a+b+c＜0，b＝2a，∴a＝b，∴b+b+c＜0，∴3b+2c＜0，故④正确；∵当x＝﹣1时，二次函数有最大值，所以当m为任意实数时，有a﹣b+c≥am2+bm+c，所以a﹣b≥m（am+b），故⑤错误．故选：C．二．填空题（共5小题）解得m＝﹣1．故答案为：﹣1．9．【解答】解：∵y＝（x+4）2﹣1，∴抛物线的顶点为（﹣4，﹣1），故答案为：（﹣4，﹣1）．10．【解答】解：∵y＝﹣（x+2）2，∴抛物线开口向下，对称轴为直线x＝﹣2，∴x＜﹣2时，y随x增大而增大，x＞﹣2时，y随x增大而减小，故答案为：＜﹣2，＞﹣2．11．【解答】解：∵y＝x2+2x﹣3＝（x+1）2﹣4，∴可知图象开口向上，对称轴为直线x＝﹣1，顶点坐标为（﹣1，﹣4），把x＝﹣3代入y＝x2+2x﹣3得，y＝0，∴当﹣3＜x＜1时，函数值y的取值范围是﹣4≤y＜0．故答案为：﹣4≤y＜0．12．【解答】解：∵抛物线y＝ax2+bx+4与y轴交于点C，∴C（0，4），∴OC＝4，∵A（﹣3，0），∴OA＝3，∴AC＝5，∵AB平分∠CAO，∴∠BAC＝∠BAO，∵BC∥x轴，∴∠CBA＝∠BAO，∴∠BAC＝∠CBA，∴CB＝CA＝5，∴B（5，4）．把A（﹣3，0）、B（5，4）代入y＝ax2+bx+4，解得，∴抛物线解析式为y＝﹣x2+x+4．故答案为：y＝﹣x2+x+4．三．解答题（共6小题）13．【解答】解：∵y＝﹣x2+4x+5＝﹣（x﹣2）2+9，∴抛物线y＝﹣x2+4x+5的开口方向向下、对称轴为直线x＝2、顶点坐标为（2，9）．14．【解答】解：（1）把M（﹣2，3）代入y＝﹣x2+mx+3得：﹣4﹣2m+3＝3，解得m＝﹣2，∴y＝﹣x2﹣2x+3＝﹣（x+1）2+4，∴抛物线的顶点坐标为（﹣1，4）；（2）∵y＝﹣（x+1）2+4，∴抛物线开口向下，有最大值4，∵当x＝0时，y＝3，当x＝﹣3时，y＝0，∴当﹣3≤x≤0时，y的取值范围是0≤y≤4．15．【解答】解：（1）∵抛物线L有最低点，∴二次项的系数a大于0．即m﹣2＞0．∴m＞2．（2）∵抛物线L与抛物线y＝x2的形状相同，开口方向相反，∴二次项的系数a互为相反数，即m﹣2＝﹣1．∴m＝1．16．【解答】解：（1）把A（2，0），代入y＝﹣x2+4x+k得k＝﹣6，∴这个二次函数的解析式为y＝﹣x2+4x﹣6，当x＝0时，y＝6，（2）∵y＝﹣x2+4x﹣6＝﹣（x﹣4）2+2，∴这个二次函数图象的顶点坐标为（4，2），∴C（4，0），AC＝OC﹣OA＝4﹣2＝2，∴△ABC的面积＝AC•OB＝×2×6＝6．17．【解答】解：（1）∵抛物线y＝﹣x2+bx+c经过点C（0，2），A（﹣3，0），∴，解得，∴该抛物线的函数表达式为y＝﹣x2﹣x+2．（2）存在，设抛物线的对称轴交x轴与点D，∵y＝﹣x2﹣x+2＝﹣（x﹣1）2+，∴抛物线的对称轴为直线x＝﹣1，∴D（﹣1，0），∵点B与点A关于直线x＝﹣1对称，∴AD＝BD，如图1，△APB是以AB为斜边的直角三角形，点P在x轴的上方，∴∠APB＝90°，∴PD＝AD＝AB＝﹣1+3＝2，∴P（﹣1，2）；如图2，△APB是以AB为斜边的直角三角形，点P在x轴的下方，∴∠APB＝90°，∴PD＝AD＝AB＝2，∴P（﹣1，﹣2）综上所述，点P的坐标为（﹣1，2）或（﹣1，﹣2）．18．【解答】解：（1）将A（0，﹣），点B（1，）代入y＝x2+bx+c得：，解得，∴y＝x2+x﹣．（2）∵2﹣（﹣）＞﹣﹣（﹣2），∴当x＝2时，y取最大值22+2﹣＝．∵y＝x2+x﹣＝（x+）2﹣2，∵抛物线开口向上，对称轴为直线x＝﹣．∴当x＝﹣时，y取最小值为﹣2．（3）PQ＝|﹣2m+1﹣m|＝|﹣3m+1|，当﹣3m+1＞0时，PQ＝﹣3m+1，PQ的长度随m的增大而减小，当﹣3m+1＜0时，PQ＝3m﹣1，PQ的长度随m增大而增大，∴﹣3m+1＞0满足题意，解得m＜．。
2023-2024学年初中英语全册9年级英语人教版课后作业Unit 4 Section A
课后作业Unit4 Section A一、补全单词1. Our school held an English __________(演讲) competition last week.2. The s of the football match is two to two.3. No one talks now and everyone keeps s ____ about the news.4. India is an A country. It’s on the southwest of China.5. I’ll have an i for a new job tomorrow. I have to prepare for it.6. We all know that Alan is a very （有幽默感的）man.7. A (看守) is standing in the corner of the hall.8. France is a E____________ country.9. I like to read book on ___________(非洲) culture.10. We are so busy that we seldom have our p________ time.11. Our history teacher told us the _____________(背景) to the war.12. The girl couldn’t say anything in front of the class because of he r s_________.13. Memorizing the sentences is h___________ for improving our writing.14. Don’t speak too loudly in p__________.15. He studied hard and got good s__________ in his exams.16. The film is （幽默的）a n d moving.17. Would you be good enough to keep (安静的)?18. She needs to win this point to level the (得分).19. Get the fall in the (背景), will you?20. They (采访)people from all walks of life.21. The experience in army is ( help) to him.二、适当形式1．I am interested in ________ (tell) a story.2．He dares ________ (watch) the show.3．He is able ____________ (travel) in the countryside.4．He is _____ __ (prepare) _____ __(take) risks in his life. He is used to _________(take) risks. 5．He gave up __________ (drive)．6．I didn't use________ (be) popular.7．I ________ (use) to water my flowers.8．The book is very ________,and it ________ a lot (help).9．I am afraid of ________ (be)alone at night.10．China is an__________ country, and we come from __________ (Asia)．11.The boy is often in __________,and he is often_________ in class.(silent)12.The girl took up_________(give) a speech in public_________(deal)with her_________(shy).13.The man is prepared__________(go) fishing.14._________(hang) out _________(be) almost impossible for her, because she is too busy.15.He often gives ______(speak) in the university.16. Hanging out is almost__________ (possible) for her, because she is too busy.17. That (Asia) stopped me and asked if I was Chinese.18. The tour took in six ( Europe) capitals.19. Most ( Africa) people are black people.20. He used (live) in London.三、填词I _______1_______(采访) 19-year-old ______2_____(亚洲的) pop star Candy Wang yesterday. She used ____3____(be) shy and took up _____4______(sing) _____5____(deal) ____6_____ her _____7______(shy). As she got better, she dared ___8_____(sing) in front of her class then for the w___9_____ school.There are many good things after she became famous, like ____10_____(be) able _____11_____(travel) around the world. She always gets tons of a____12_______ everywhere she goes. She always has toworry ___13_____ how she appear __14____ others, and she has to be very careful ___15_____ what she says or does. And she doesn’t have much p___16_____ time anymore. Even ____17____(hang) out with friends is almost i_____18______ for her now.She says to all those young people who want to become famous, “You have to be prepared _____19______(give) up your normal life. You can never imagine how difficult the road ___20__ success is. Many times I thought about ___21_____(give) up, but I fought ___22____. You really n_____23____ a lot of talent and hard work ____24_______(succeed). Only a small number of people make it ___25____ the top.”四、根据汉语提示完成句子：1. 我过去常常怕黑。
2023-2024学年人教新目标英语九年级上寒假作业(三)(含答案)
2023-2024学年人教新目标英语九年级上寒假作业(三)(含答案)一、翻译下列词组。
1.向左转________2.买一双鞋子________3.在某人的右边________4.沿着主大街走________5.吃饭________6.去三楼________7.走过书店________8.休息室________9.有……独特之处________10.请再说一次________11.过来;加油________12.抓住某人的手________13.在去.......的路上________14.路过________15.摇滚乐队________16.寄信________17.在购物中心________18.在某些场合________19.引人一个请求________20.使用合适的语言________21.停车________22.地下停车库________23.换钱________二、单项选择。
1. Julie helped me buy some stamps when she ________ the post office this morning.A. cleared outB. set upC. thought ofD. passed by2. — Kevin was late for the party.— That's ________ he didn't know what time it would begin.A. ifB. howC. becauseD. why3. — Do you know ________ every morning?— Yes. He has to catch the school bus.A. why Marcus gets up earlyB. why does Marcus get up earlyC. why did Marcus get up earlyD. why Marcus got up early4. —________, where's the restroom?— This way, please. I will show you there.A. No problemB. Of courseC. Thank youD. Pardon me5. — Mom, could you please answer the phone?—________. I'm taking a shower.A. Sorry, I can'tB. Sure, I canC. I hope notD. I hope so6. — Hello. I wonder if there is ________ underground parking lot nearby.— Sorry, I don't know. You can ask the man over there.A. aB. anC. 不填D. the7. — Why did George get that job instead of me?— You are ________ than him. The job needs great care.A. more carefulB. the most carefulC. less carefulD. the least careful8. —________ do you wish to speak to at the party?— Mrs. Green.A. WhenB. WhatC. WhyD. Whom9. Mona suggests ________ the mountain this weekend. I don't agree because of the terrible weather.A. not to climbB. to climbC. not climbingD. climbing10. — Dad, do you know ________ my mom will come back? I miss her very much.— Next month, dear.A. whenB. whetherC. howD. where三、完形填空。
内蒙古呼和浩特市九年级英语寒假作业4 人教新目标板
二. 完型填空。
What must you do when you receive a presen t for your birthday? You have to sit down and write a 1 . The words "Thank you" are very important. We have to use 2 on so many occasions. We say them 3 someone gives us a drink, helps up to pick up things, hands us a letter, lends us a book or gives us a lift.4 important word is "please". Many people forget to use it. It is5 to ask someone to do something without going "please". We have to use it when we6 something, too. It may be a book or a pencil, more rice or more sauce（酱油）, help or advice. It may be in the classroom at the bus-stop or o ver the counter. We have to use “plea se” to make request7 .We have to earn to say “sorry,” too. When we have 8 someone's feelings, we will have to go up and say we are sorry. When we have told a lie and feel sorry. We will have to use the same word. When we have forgotten something or broken a promise, we will have to explain with that word, too.” Sorry" is a healing (和解的) word. We can make peo ple 9 wrongs by using it sincerely.These three words are simple but important. Man had to use them again. They are pleasing words to use in 10 language.( ) 1. A. letter B. postcardC. guidebookD. thank-you note( ) 2. A. it B. these C. them D. they( ) 3. A. since B. when C. before D. until( ) 4. A. The other B. Another C. Other D. The others( ) 5. A. polite B. guilty C. rude D. friendly( ) 6. A. look at B. care about C. ask for D. use up( ) 7. A. worded B. sorry C. angry D. pleasant( ) 8. A. know B. hurt C. hear D. get( ) 9. A. remember B. throw C. correct D. forget( ) 10. A. one B. some C. any D. few三．阅读理解。
2023-2024学年人教新目标英语九年级上寒假作业(四)(含答案)
2023-2024学年人教新目标英语九年级上寒假作业(四)(含答案)一、翻译下列词组。
1.直发________2.在…方面取得好成绩________3.不时，有时________4.应对，处理________5.公开地，在别人面前________6.害怕________7.不再________ 8.为..骄傲________9.亲自，亲身________ 10.为..感到自豪________11.大体的自我介绍________ 12.做出决定________13.寄宿学校________ 14.注意，重视________15.照顾________ 16.放弃________17.足够勇气________ 18.变红________19.讨厌体育课________ 20.步行去学校________21.在足球队________ 22.担心________23.一直________ 24.对…感到紧张________25.十五岁的男孩________ 26.缺席________二、单项选择。
1. She is________girl from Asia.A. a 18-year-oldB. an 18-year-oldC. an 18-years-oldD. a 18-years-old2. She used________late. But now she is used________early.A. to get up, to getB. to getting up, to getting upC. to getting up, to get upD. to get up, to getting up3.However,________attention can also be a bad thing.A. too muchB. much tooC. too manyD. many too4.—Many students don't know how to________difficulties and become worried.—I think they should ask the teacher for help.A. play withB. deal withC. talk withD. come up with5. I didn't use to be popular in school, but now I get________attention everywhere I go.A. much tooB. veryC. tons ofD. a lot6. In our school library there________a very small number of books on science, and in these years the number of them________growing larger and larger.A. is, areB. are, isC. have, areD. have, is7. Though he is________at home, he doesn't feel________for he has many things to do.A. lonely, lonelyB. lonely, aloneC. alone, aloneD. alone, lonely8. —Mom, I was the first to reach the top of the mountain.—Good job, Jack. I'm________of you.A. carefulB. tiredC. proudD. afraid9. Lucy used to go to bed late,________she?A. didn'tB. doesn'tC. hadn'tD. isn't10. Dad, smoking is bad for your health. You'd better________.A. give up itB. give it upC. give it backD. give back it三、完形填空。
九年级英语寒假作业答案（4）
九年级英语寒假作业答案（4）2016年九年级英语寒假作业答案大全7. I have been teaching in china for 2 years.8. Since I came to China, I’ve been learning a lot about my family history.9. It was very interesting for me to learn that a few Jews came to live in china many years ago.10. If you study hard, you’ll be able to understand any culture.11. The more you learn about Chinese history, the more you enjoy living in china.12. I live quite far from Beijing, but I’m sure I will come here for the Olympics in 2008.Unit5—6单元扩展知识1. Do you know if it will snow tomorrow? If it snows tomorrow, we will not climb the mountain.2. My dream is to be a professional athlete. = Being / To bea professional athlete is my dream.3. How long have you been living in WeiHai? I have been living here since I was born.4. My brother is interested in collecting stamps.5. The more careful you are, the fewer mistakes you will make.6. The less you eat , the thinner you will be.7. What sport does he usually play? He usually plays tennis.When did he start / begin to play? He started / began to play when he was 11.How long has he been playing? He has already been playing for 5 years and a half. / 5 and a half years.UNIT7PHRASES1.turn down the music 43.one of the most polite ways2.right away 44.put out the cigarette3.wear those old jeans \\wear that old pair of jeans 45.like to be criticized4.get out of the bathroom 46.pick it up5.put it on/take it off6.another pair7.leave a note on the door8.at a meeting9.wash the dishes10.return the book to the library11.finish these tasks12.help me in the kitchen13.make posters14.no problems15.give you a terrible haircut16.give you the wrong size17.bring you the wrong food18like waiting in line19.a shop assistant20.hav. a long telephone conversation21.follow me around22.need some help23.get annoyed24.happen to me25.all the time26.want to be polite27.in an English-speaking country28.normal and polite social behavior29.seem like a different word30.in every culture31.in every situation32.stand very close to the person33in some Asian countries34.feel uncomfortable35.talk loudly36.be allowed37..in a museum38..even if39.keep voice down40.in public places=in public41.take care not to cough42.see someone breaking the rules of etiquetteSENTENCES1.Would you mind turning down the music? No,not at all2.Would you mind cleaning your room? I am sorry.I will do it right away.3.Would you mind not playing baseball here?Sorry.We will go and play in the park.4.The pen you bought did not work.5.Could you please not follow me around?6.For example ,standing very close to the person who you are talking with is quite common in some Asian countries.7.Could you please put out the cigarette?8.Dropping litter is almost never allowed.9.Talking loudly is a museum or a movie theater is impolite .=It is impolite to talk loudly in a museum or a movie theater.10.We should take care not to cough or sneeze loudly in public.UNIT8PHRASES1. buy sb a gift=buy a gift for sb 29.sing clrarly2. too personal 30.on stage3. special enough 32.as well as/as good as4. not creative/interesting enough 33.from all age groups5. What a lucky guy! 34.all over China6. keep such a pet 35.the winner of t he woman’s compitation7. on my tenth birthday 36.both winners8. the trendiest kind of pets 37.encourage people to speak English9. these days 38.try to speak English more10. be perfect 39.make progress11. the most unusual pets 40.have fun speaking English12. an 80-year-old grandmother 41.hear of13. make a special meal 42.find out14. take us out to dinner 43.be interest in learning English=take an16. be not good at all interest in learining English17. fall asleep 44.besides singsing English songs下载文档润稿写作咨询。
九年级英语上册寒假作业四
九年级英语上册寒假作业四一、单项填空1．—The boy lost is crying there.—How do you know he gets lost?A．whose B．who C．who's D．whom 2．(2019·山东)—Mom, which is the better for me, a senior high school or a vocational(职业的) high school?—Either is OK. It's up to your future plan.A．choice B．result C．experience D．news 3．—Tom is always careless with his schoolwork. Could you help him?—No problem! I think he to think twice before starting.A．should be told B．shouldn't be toldC．should tell D．couldn't told4．(2019·甘肃)—Listen! Is that Linda playing the piano in the room?—No. It be Linda, she has gone to London.A．may not B．needn't C．can't D．mustn't 5．(2019·天津)The of this activity is to raise money for a new hospital. A．silence B．purpose C．culture D．language 6．Alice be very interested in physics. She spends all her spare time on it.A．must B．mustn't C．need D．can't7．I am worried about my brother because I haven'tletters from him for a long time.A．accepted B．writtenC．received D．collected8．—I'm not sure to do with my problem.—Why not ask your English teacher for help?A．when B．what C．how D．which9．The song is very moving and its lyrics the singer's feelings well. A．imagine B．express C．discuss D．expect10．The law prevents businessmen buying and selling ivory—teeth of the elephant.A．by B．of C．against D．from二、完形填空A)请先阅读下面短文，掌握其大意，然后从各小题所给的A、B、C、D四个选项中选出可以填入相应空白处的最佳选项。
寒假作业复习巩固提升+人教新目标九年级英语(四)+语法提升篇+含答案解析
寒假作业复习巩固提升人教新目标九年级英语（四）语法提升篇（含答案解析）题型：划线部分提问、连词成句、根据汉语提示补全句子、改写句子、看图写句子一、对划线部分提问五、看图写句子41．—Why were you late for the party, Mary?—（请用关键词go off, so 及oversleep 回答）42．—How did the story make you feel? （请用一句话作答）—43．A: ?B: No, it’s not mine. I think it’s Lily’s.44．A: Where was the cap made?B:45．—What did your brother use to be like?—根据所提供的的图片, 用一个完整的句子提问或应答。
46．A: Excuse me. ?B: Yes, there is.It’s on Jingshi Road.47．——I like music that I can dance to.48．—What are people supposed to do in Japan when they meet for the firs time? —49．—What instrument can Lily play?—50．—What are people not allowed to do in the museum?—参考答案：1．What are【详解】句意：在中国，人们第一次见面时应该握手。
根据划线部分“shake hands”可知，此处用what进行提问，置于句首，首字母要大写，同时用do来代替划线部分的动作；将余下部分改成一般疑问，需将are提前置于疑问词之后主语之前。
故填What；are。
2．Whose is【详解】句意：这是凯文的CD播放机。
划线部分是“凯文的”，因此要对物品的所有人提问，用whose引导特殊疑问句，再结合“this”可知是单数，该句是一般现在时，be动词应用is；句首开头字母大写。