All his attempts to unlock the door were

All his attempts to unlock the door were , because he was using the wrong key.
A.in return B.in vain C.in doubt D.in time
aaa小鬼 1年前 已收到1个回答 举报

yupmghp 幼苗

共回答了20个问题采纳率:75% 举报

B

考查短语辨析。in return 作为回报,in vain 白费力,白辛苦,in doubt 怀疑的,in time 及时,句意:打开这个门的所有努力白费了,因为他用错了钥匙。所以选B。

1年前

8
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