Bill won’t make any progress __ he studies harder than before.A．ifB．whenC．becaus

题型：不详难度：来源：

Bill won’t make any progress __ he studies harder than before.

A．if

B．when

C．because

D．unless

答案

解析

考查条件状语从句的引导词的选用。句意，除非Bill比以前更加努力的学习，否则他不会取得任何进步。If如果 when当……时候 because因为 unless除非。根据题意，故选D。

举一反三

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A．Because; /

B．Though; /

C．Because; so

D．Though; but

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______he isn’t tall,_______ he is strong.

A．Though; but

B．But, so

C．Though; so

D．Though; 不填

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A．be

B．have

C．has

D．is

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--- Oh, good. But be sure to phone me _______ you get to Beijing, please.

A．because

B．why

C．when

D．if

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A．But

B．Even though

C．So

D．Because of

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