2. 外语
  3. In vain______ to get in touch with the authorities.

In vain______ to get in touch with the authorities.

admin2009-02-10  47
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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