2. 外语
  3. In vain______to get in touch with the authorities.

In vain______to get in touch with the authorities.

admin2012-03-21  63
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 语法类试题(倒装旬)。in vain后面接倒装句。
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