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—Mom, can I go out and play with my friends now?

—No, honey, you can’t _____ you haven’t recovered from the knee injury.

A. until B. before C. as D. unless

 

C

【解析】

試題分析:句意:--媽媽我現(xiàn)在能和朋友出去玩嗎?--不,親愛的你不能,因為你的膝蓋的傷還沒有恢復。As這里表示“因為,既然”,A. until直到,B. before 在…前面,D. unless除非,所以選C。

考點:考查連詞

 

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