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
All his attempts to unlock the door were, because he was using the wrong key.A. in returnB
答案:2 悬赏:40 手机版
解决时间 2021-12-02 15:44
- 提问者网友：人傍凄凉立暮秋
- 2021-12-02 00:34
最佳答案
- 五星知识达人网友：一叶十三刺
- 2020-03-06 14:59
A. in return(答案→)B. in vainC. in doubtD. in time解析：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。
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- 1楼网友：像个废品
- 2020-12-25 00:32
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