题目内容
15. You ought to have thought of that, but you
A. haven't B. didn't
C. don't D. can't
15. B 考査动词的时态。句子前面说ought to have thought of (本应该想起），是对过去发生的动作和存在的状态的推测和假设，但事实上没有。后面说的是过去的事实，用过去时态。
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题目内容
15. You ought to have thought of that, but you
A. haven't B. didn't
C. don't D. can't
15. B 考査动词的时态。句子前面说ought to have thought of (本应该想起），是对过去发生的动作和存在的状态的推测和假设，但事实上没有。后面说的是过去的事实，用过去时态。