It's 5 days we came here. Why shouldn't we start?

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

 

D

【解析】

試題分析：句意：從我們到這里來已經(jīng)五天了。為什么我們不出發(fā)呢？ A. When當...時候B. before 在...之

前 C. As如同，因為D. Since因為，自從。故選D。

考點：考查連詞辨析。

 

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