1,you mustn't be late if you want-----------(赶上早班公共汽车)

都是比较简单的练习,基本可以直接翻译,
需要注意的是其中某些动词的搭配,
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】.