1 . 选词填空

well off;   be keen on;   be ashamed of;   in all ;     on behalf of ;   refer to

1. They would never _________ that matter again.
2. You should _________ yourself for telling such lies.
3. In addition, a hero must be optimistic and diligent and_________ his hard work.
4. It won't be long before the Chinese people will become _________.
5. Please allow me to thank you for your offer of help _________ my colleagues.

2 . 选用适当的单词或短语补全对话
Boss: All the documents     1     （must/can） be prepared before the meeting starts
Secretary: I know that. Kelly has been working on the documents since last Monday. She     2    （may/must）have got everything ready but I am not sure.
Boss: Wheres Kelly then?
Secretary: She     3     （must/has to）be in the sales managers office now. I saw her go in there a minute ago.