—I knocked but nobody answered the door. ----They asleep then and didn’t hear you.A. must
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解决时间 2021-04-08 00:33
- 提问者网友：鐵馬踏冰河
- 2021-04-07 18:29
—I knocked but nobody answered the door.
----They asleep then and didn’t hear you.
A. must be
B. should be
C. must have been
D. should have been
最佳答案
- 五星知识达人网友：渊鱼
- 2021-04-07 19:57
A. must beB. should be(答案→)C. must have beenD. should have been解析：考察虚拟语气.句意:我敲门但是没有人开门._那时候他们一定是已经睡着了,没有听到你敲门. “must+have+done”表示对过去事情的肯定推测，译成“一定做过某事”故选C.
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- 1楼网友：枭雄戏美人
- 2021-04-07 20:24
这个答案应该是对的
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