Deserts . Land is becoming desert little by little because .

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问题 Deserts ______.
Land is becoming desert little by little because ______.

选项 A、plants can’t grow there
B、there is not enough rain
C、people haven’t done what scientists wish them to do
D、scientists know little about the deserts

答案C

解析土地慢慢沙化的原因不是缺少雨水，也不是植物不能生长，更不是科学家知之甚少，而是人们自己的行为造成的，第一段最后一句作了解答。

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本试题收录于：公共英语二级笔试题库公共英语（PETS）分类

公共英语二级笔试

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Deserts ______. Land is becoming desert little by little because ______.

公共英语二级笔试

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