The waiting time (short) ______ dramatically from eight weeks to just one week s

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问题 The waiting time (short) ______ dramatically from eight weeks to just one week since the new rule was set.

选项

答案 has been shortened

解析从句由since引导，故主句应为现在完成时，并且需要采用被动语态。首先将short变成它的动词形式shorten，再改为现在完成时的被动语态，所以正确答案为has been shortened。

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[originaltext]W:I’msorrytohavekeptyouwaiting.M:That’sallright.I’ve