2012.12大学英语四级改错习题和答案精选
2012.12大学英语四级改错习题和答案精选
这篇关于2012.12大学英语四级改错练习题及答案精选，是笔者特地为大家整理的，希望对大家有所帮助！
Only a generation ago, Mauritania’s capital city was
many day’s walk from the Sahara. Today it is in the Sahara. 1.__________
The sand blows through the city streets and piles up in 2.__________
walls and fences. The desert stretches out as far as the
eye can see.
In some parts of the Amazon rain forest in brazil, all
the trees have cut down. The earth lies bare and dry in the 3.__________
hot sun. Nothing grow there anymore.
4.__________
Over vast areas of every continent, the rainfall
and
vegetation necessary for life is disappearing. Already 5.__________
more than 40 percent of the earth’s land is desert and 6.__________
desert-like. About 628 million people--one out of seven--
live in these dry regions. In the past, they have managed to
survive, but in difficulty. Now, largely through problems 7.__________
caused by modern life, our existence is threatened by the 8.__________
slo w, steady spread of the earth’s deserts.
Many countries first became concerned in 1970s after 9.__________
a terrible drought and famine destroyed Africa’s Sahel,
the fragile desert along the south edge of the Sahara.
Thousands of people died even though there was a worldwide
effort to send food and medicine to the starved people. 10.__________
年6月大学英语四级真题及参考答案
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大学物理下册选择题练习题
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精选新版2019年大学物理实验完整考试题库200题(含标准答案)
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