4. They weren’t able to find any secrets.

　 They ____ ____ any secrets.

3. Wash your face at once.

　 You ____ ____ your face at once.

2. She can cook well.

　 She ____ ____ ____ cook well.

1. You must wash the clothes.

　 You ____ ____ wash the clothes.

5. ____ I have a look at your stamps?

4. I ____ go now. It’s late.

3. Excuse me, ____ I ask you a question?

2. -____ I come in?

　 -Yes, please.

1. -____ he speak Chinese?

　 -Yes, a little.

5. My parents don’t ____ me to play computer games at home.

II. 用适当的情态动词填空