Every means has been . No one is effective.A. trying outB. tried outC. trying inD. tried o

发布时间：2020-08-16 13:06:42


Every means has been     . No one is effective.
A. trying out
B. tried out
C. trying in
D. tried on

网友回答

A. trying out
(答案→)B. tried out
C. trying in
D. tried on
解析：词组辨析题。句意：每一种方法都尝试过了，没有一个有效。Try out 尝试，try on 试穿；根据语境可知“方法”是被“尝试”所以要用过去分词表被动。选B
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