Ⅰ. 用适当的情态动词填空
1. —May/Can I go out and play basketball, mum?
—No, you must finish your homework first.
2. Could/Can you tell me where the station is?
3. —You can call him if you want to.
—I needn’t! He is sure to call me.
4. —A computer can’t think for itself.
—You are right. It must be told what to do.
5. You mustn’t smoke in public places!
6. I’m sorry that you should think so badly of me.
7. —This pencil is very short, can you still use it?
—No, I can’t. You must buy one for me.
