-The air pollution is terrible．-It will be worse everyone plays a part in Saving the environment．( )A．ifB．unlessC．untilD．when 题目和参考答案——青夏教育精英家教网—

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8．-The air pollution is terrible．
-It will be worse________everyone plays a part in Saving the environment．（　　）

A．

B．

unless

C．

until

D．

when

分析 --空气污染太厉害了．
--除非每个人都在挽救环境中起到了作用，否则污染还会更厉害．

解答答案：B．
if的意思是"如果"引导条件状语从句；unless意思是"除非，如果不"引导条件状语从句；until意思是"直到…"引导时间状语从句；when意思是"当…的时候"引导时间状语从句．根据"everyone plays a part in Saving the environment．"每个人都在挽救环境中起到了作用，以及"It will be worse"污染还会更厉害．因此可知整句话的意思是"除非每个人都在挽救环境中起到了作用，否则污染还会更厉害．"结合给出的四个选项，故选B．

点评首先要掌握句子的意思，然后结合给出的四个选项，就可以确定正确答案．

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