初中英語完成句子問題

都是比較簡單的練習，基本可以直接翻譯，
需要注意的是其中某些動詞的搭配，
如want 后接to do等

1、you mustn't be late if you want 【 to catch the early bus】。
2、I'll tell him about it when 【 he comes to see me】.
3、don't talk to me when i'm doing【 my homework】.
4、you must read it again before you【do the excercise】.
5、he must be very tired after he walked 【for three hours】.
6、you need help if you can't【 repair the TV set】.
7、they go to the farm to help with the rice harvest when the farmers【are busy】.