题目内容
8.-The air pollution is terrible.-It will be worse ________ we take action to protect the environment.( )
A. | if | B. | unless | C. | until | D. | when |
分析 翻译:
-空气污染很可怕.
-除非我们采取行动来保护环境,否则会变得更糟.
解答 if表示如果;unless表示除非;until表示直到…才;when表示当…时候.根据语境和句意除非我们采取行动来保护环境.故选:B
点评 本题考查条件状语从句.if和unless引导的条件状语从句中,主句是一般将来时,从句用一般现在时代替一般将来时.
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