2. 外语
  3. They should have gone earlier, ______?

They should have gone earlier, ______?

admin2009-06-28  53
问题 They should have gone earlier, ______?
选项 A、have they
B、didn’t they  
C、haven’t they
D、shouldn’t they
答案B
解析 didn’t they本题考查虚拟语气，should have gone是对于过去事实的虚拟，所以反意疑问句用助动词do的过去式。
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