2. 外语
  3. In vain______to get the machine sold yesterday.

In vain______to get the machine sold yesterday.

admin2012-05-04  43
问题 In vain______to get the machine sold yesterday.
选项 A、he tried
B、had he tried
C、he had tried
D、did he try
答案D
解析 倒装结构题。in vain意为“徒劳地；白费；无效”，表否定意义，放在句首要用部分倒装，此处就是把助动词提到主语前面，且时间副词是yesterday，故用一般过去时，所以did提到he之前，后面跟动词原形。故D为答案。
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