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.