二. 用所给词的适当形式填空(10分)
1. Amy is too young ________(join) us in visiting the USA.
2. We should speak to everyone around us ________(polite).
3. It’s a long way, so it’s best for us to take turns _______(drive).
4. I’m sorry that you didn’t finish the task ____________(success).
5. The day before yesterday, we had a __________(discuss) about our subject.
6. Her clothes are often bright in _________ (colourful).
7. I f you keep practicing ____________(speak) English every day, you will good at it.
8. Don’t talk with others while __________(eat).
9. He is tall enough _______(reach) the box on the shelf.
10.You should warn your group members ___________(not do ) it.