题目内容
________ you work more efficiently are you able to catch up with others in the class.
A.Only when B.Long before
C.Unless D.Until
A
本题考查only+状语引导的倒装结构。由于后面主句are you able to catch up with others...采用了倒装语序,因此应选择A。“only+状语从句”放在句首时,主句用倒装语序,但应注意when从句不倒装。
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