高二下学期英语期中考试试卷第21套真题

高二下学期英语期中考试试卷一、阅读理解（共15小题；每小题2分，满分30分）1. 阅读理解Ottawa museum of NatureTherange of products and services available at the Ottawa Museum of Nature is asbroad and interesting as the range of activities.·Birthday Parties: Give yourchild — aged from 4 to 12 — an unforgettable birthday party at the museum!·Facility Rentals: Planningan event in Ottawa? Let our elegant, historic, castle-like setting and our dedicatedstaff help you create a magical event to remember!·Travelling Exhibition RentalsLooking for new programming for your institution? We have many popular travelling exhibitions — small and large —that tour across Ottawa.·Photo and Film Shoots:Either of our unique buildings would make great backdrops for your project. Whether for acommercial , education, media, of fashion production, we’ve got a locationfor you.Howto get here?Ifyou are on Highway 417 , take the Metcalfe exit, No. 119. You Can see the museum from thehighway look for a “castle” on the north side.Walking from the downtownThe museum is only 20-minute walk froParliament Hill. Metcalfe Street takes youdirectly to the main entrance of the museum. Elgin and O’Connor streets take you to theouter edges of the museum grounds.MembershipWestrongly advise you to apply for our membership. A lot of on-site benefits arewaiting for you:Free admission to themuseum for one year;Free admission to temporaryblockbuster exhibitions ;Discounton museum programs, including adult workshops and special lectures ;10 points for use at theNature Trade;10% discount at thc NatureCafé.（1）What can people do in the museum?A . Hold birthday parties for friends.B . Enjoy a movie from Hollywood.C . Organize a tour across Ottawa.D . Shoot an advertising video.（2）What does the museum mainly do?A . Offer visitors various kinds of exhibitions.B . Carry out different social services.C . Provide special occasions and services.D . Help family and friends get together.（3）What can you get as a member of the museum?A . Free snacks and coffee for a year.B . On-site discounts and offers.C . At least a 20%o discount on museum programs.D . Life-long free admission to the museum.2. 阅读理解This past summer I went on a journey to Canada’s Arctic with Students On Ice. When I left Calgary I wondered what I would find what I would learn and who I would meet. On the trip to Ottawa I was wrapped in a blanket of uncertainty and excitement. But when I first met the group of students, scientists and leaders, I knew that l didn’t have anything to worry about. The group was amazingly receptive and I was soon part of a big family setting out on an amazing adventure—an adventure of a lifetime!When we reached the Arctic I saw a vast Land that appeared untouched and original. I was surprised by its great size and beauty and my senses were repeatedly shocked and amazed. I stood on the Kapitan Khlebnikov and saw twelve polar bears. They walked in search of seal holes, and patiently waited for a meal. I learned that polar bears are successful only one out of every twenty hunting attempts.However, I learned that the Arctic and its people are being threatened by pollution and global warming. I learned that pollutants are carried by ocean and air and have a bad effect on all Arctic people. I learned that global warming has put polar bears at risk because a warmer climate means that they have a shorter time to hunt seals on the ice.The trip was a feast for the senses. I have learned more about our environment, and particularly how alive and interesting the Arctic is and why it is so important to take care of it. I learned pollution, ignorance of individual and global problems need to be solved. The Arctic deserves to be preserved.My trip with Students On Ice has made me more determined to try to ensure that I do not leave harmful footprints on either Earth or its people.（1）What can we learn from the first paragraph?A . The writer was too excited to bring a blanket.B . The writer was thrilled and full of wonder before the trip.C . The group the writer joined was strict with its members.D . The writer found it hard to fit in with the group.（2）Which is true about the polar bears according to the passage?A . It’s not easy for them to catch seals.B . They are at risk because the land is vast and untouched.C . They prefer a little warmer climate.D . They warmly welcomed the writer and her party.（3）How did the writer feel about the trip according to the last paragraph?A . Surprising.B . Alarming.C . Appealing.D . Rewarding.（4）What would he the best title for the passage?A . Global Warming and Canada’s ArcticB . The Arctic I s under Severe ThreatC . My Trip to the Canadian ArcticD . Polar Bears and Me3. 阅读理解Scientists have found an unexpected use for virtual reality headsets . The devices , widely used by computer gamers, show pictures that can be used to test the navigational skills of people, who were thought to be at risk of dementia . Those who do worse in the tests will be the ones more likely to develop Alzheimer’s disease later in life, scientists now believe.The discovery that the loss of navigational skills was associated with Alzheimer’s was made several years ago by Dennis Chan and his colleaguesbased at several centers in the UK. These studies used computers to test navigational tasks. But now scientists plan to take their tests to a new level with the use of the virtual reality headsets in which wearers are placed in man-made environments through which they must navigate.Around 300 people, aged between 40 and 60, will be arranged to participate in the study. Some will have a gene that puts them at risk of the condition or will come from a family with a history of Alzheimer’s. Not all will certainly be affected by the disease, however. Chan’s project aims to find out who will. Wearing the headsets, participants will be asked to navigate their way through a series of different environments and then remember the details.Researchers recently pointed out the significance of a tiny area of the brain known as the entorhinal cortex . It acts as a center in a widespread brain network that controls navigation. This now appears to be the first part of the brain that seems to be easily harmed by Alzheimer’s.The goal of the work is to help people as they develop the disease. “So far, drug trials for Alzheimer’s have been applied when people have already got dementia, by which time considerable damage to the brain has already occurred,” Chan told the Obsenver. “If we can develop drugs and use them earlier, for example, before the disease has spread beyong the entorhinal cortex,then this would have the potential to prevent the dementia.”（1）What does the unexpected use of VR headsets mentioned in Paragraph 1 refer to?A . Making games mor interesting for computer gamers.B . Testing onespotential to develop dementia.C . Helping people suffering Alzheimer’s recover.D . Reducing the risk of harming chemicals.（2）What are the participants required to do in the study?A . Know unfamiliar environments by using tablet computers.B . Identify directions in some man-made environments.C . Play computer games by using navigational skills.D . Create special environments by using navigational skills.（3）What’s implied about the entorhinal cortex in the brain?A . Its functions have becn known for years.B . It can be expanded by using VR headsets.C . It can directly affect one’s navigational skills.D . I ts size depends on that of ones memory center.（4）From Chan’s words, we can know ________.A . he will spread the new drugB . he will try out the drugC . the study helps to prevent dementiaD . the study still needs to be improved4. 阅读理解Afterdecades of cat-and-mouse between athletes and the word anti-doping agency, athletes found what they must have believed to be the ultimate doping agent: their own blood. To enhance athletic performance with your own blood, you draw your bloodand store it in a freezer. Your body compensates by creating more blood. Then,months later, just before a competition, you can re-inject theold blood for a boost. As the red-blood-cell count goes up, so does anathlete’s ability to absorb oxygen. The more oxygen you get with each breath,the more energy your body is able to bum and the better you are able toperform.Althoughthe enhancement is small compared to actual drugs, it can be the differencebetween a gold medal and a silver medal. Best of all, “extra blood”was never something WADA tested for.ButWADA wasn’t going to sit by and be fooled. What it came up with in responsemight be a solution to stop doping once and for all: an athlete biologicalpassport . The idea is to record some biological features of an athletethrough testing done at regular intervals. The biological passport’spartial implementation —recording blood and steroid levels—began in January2014.Whenall necessary biological features are finally combined, WADA will no longer need toworry about finding new methods to detect a drug. It will only have to detect resulting changes in the body. In thecase of blood doping, if the athlete’s normal red-blood-cell count is, say, 47%, but then isfound to be 51% after a competition, cheating may have been involved.WADAis confident that the biological passport could even prevent geneticchanges—the ultimate, ever-lasting enhancement—which are surely coming next. Ifan athlete inserts a performance enhancing gene, it will probably leavedetectable changes in the body, that would differ from the athlete’s feature inthe biological passport.（1）What does the underlined word “boost” in Paragraph 1 probably mean?A . Treatment.B . T est.C . Promotion.D . Recovery.（2）What words can be used to describe the athlete biological passport?A . Complex and expensive.B . Simple and thorough.C . Flexible an popular.D . Controversial and confusing.（3）What s the writer’s attitude towards the solution of anti-doping mentioned in the text?A . Suspicious.B . Positive.C . Worried.D . Unconcerned.（4）What can we infer about the athlete biological passport?A . It can only be used to test blood doping.B . It has been completely adopted by WADAC . It is the excellent alternative of many athletes.D . It’s a good choice to ensure faimess in sports二、任务型阅读（共5小题；每小题2分，满分10分）5. 根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。