----- Mary looks very upset. She failed to pass the exam.
----- I guess so. It's very difficult after all.
A must have B could have C should have D might have
--Mary looks very upset. She failed to pass the exam.I guess so. It's very dif
答案:2 悬赏:30 手机版
解决时间 2021-12-25 01:52
- 提问者网友：人生佛魔见
- 2021-12-24 21:04
最佳答案
- 五星知识达人网友：洎扰庸人
- 2022-01-22 06:35
解析：本题考查情态动词的用法。句意：玛丽看起来很沮丧。她一定没有通过考试。must have done过去一定做过某事。
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- 1楼网友：woshuo
- 2022-01-22 07:10
我明天再问问老师，叫他解释下这个问题
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