It will be about 100 days __________the College Enhance Examination comes.

A. when B. as C. before D. since

 

C

【解析】

試題分析：考查連詞。本題考查it will … before …句型，表示“還有 …… 就 ……”。句意：還有大約100天就要高考了。故C正確。

考點：考查連詞

 

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