1 . She ________ (participate) in the activity, for she was doing paperwork in the office then. （用适当的词填空）

2 . ________________(我本该被升职) instead of you.(根据汉语提示完成句子)

4 . 你本不应该取笑他的。他是你学习而不是嘲笑的对象。
You ________________him. He is not the one you laugh at but learn from.

5 . 你本该昨天交作业的。
You ________________your homework yesterday.

6 . 据说他们是从大陆游到那个岛的，但他们不可能做到，因为中间的海洋太宽了。
It’s said that they have swum to the island from the continent, but they ________________ it because the ocean in between is too wide.

7 . 他们一定是在森林里迷路的孩子；否则，他们就会按计划去湖边露营了。
They ________________ the children lost in the woods; otherwise, they would have been at the lakeside camp as scheduled.

8 . There was plenty of time. She ________ have hurried. (用适当的词填空)

9 . You ________ have seen Mary at the meeting this morning, because she left for Beijing yesterday. (用适当的词填空)

10 . It’s said that they have swum to the island from the continent, but they ________ (不可能做到) because the ocean in between is too wide. (do) (根据汉语提示完成句子)