题目内容
Had they known what was coming next, they second thoughts.
| A．may have | B．could have |
| C．must have had | D．might have had |
D
解析试题分析：句意：如果他们知道接下来是什么,他们可能会重新考虑的。Had they known what was coming next=If they had known what was coming next，表示如果过去他们知道将会发生什么事，后半句应用 could/should /might/would+have+p.p.的形式，表示对过去事实的假设。故选D。
考点：考查虚拟语气的用法。
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| A．As | B．When | C．With | D．If |
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| A．because of your overweight | B．you are so overweight |
| C．because you are overweight | D．your being overweight |
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| A．that | B．which | C．what | D．who |
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| A．was you realized it | B．it was that you realized it |
| C．you realized it | D．was it that you realized it |
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| A．when | B．that | C．before | D．since |
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| A．which we think it is | B．which we think are of |
| C．of which we think are | D．I think which is of |