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.__________
slow, 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.__________
参考答案
1. day's → days'
2. in → against
3. have ∧ cut → been
4. grow → grows
5. is → are
6. and → or
7. in → with
8. our → their
9. in ∧ 1970s → the