In vain______ to get in touch with the authorities.A、they triedB、did they tryC

游客2024-11-01 1

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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Invain______togetintouchwiththeauthorities.A、theytriedB、didtheytryC