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In vain______ to get in touch with the authorities.A、they triedB、did they tryC
In vain______ to get in touch with the authorities.A、they triedB、did they tryC
游客
2023-11-23
62
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问题
In vain______ to get in touch with the authorities.
选项
A、they tried
B、did they try
C、they have tried
D、the had tried
答案
B
解析
in vain后面接倒装句。
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