单选题：Why are rainforests important to the world?

题目分类：英语
题目类型：单选题
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题目内容：

Why are rainforests important to the world? A．They can provide food for different kinds of insects．
B．They can lower the temperature around the Equator．
C．They are home to various kinds of plants and animals．
D．They produce the best wood for house building．

参考答案：

答案解析：

第（33）题答案

第（33）题答案A．worker B．student C．businessman D．engineer

分类：英语题型：单选题

第（32）题答案

第（32）题答案A．when B．until C．after D．since

分类：英语题型：单选题

第（26）题答案

第（26）题答案A．or B．but C．for D．and

分类：英语题型：单选题

I came across this old book while I_______my room．

I came across this old book while I_______my room．A．clean B．will clean C．have cl

分类：英语题型：单选题

第（30）题选

第（30）题选A．unless B．once C．though D．because

分类：英语题型：单选题