2. 外语
  3. In vain ______ to get in touch with the Embassy.

In vain ______ to get in touch with the Embassy.

admin2010-02-17  27
问题 In vain ______ to get in touch with the Embassy.
选项 A、they tried
B、tried they
C、did they try
D、they have tried
答案C
解析 in vain句首倒装，是半倒装，正确答案是C。
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