用can, can’t, may, must填空

1.I___ find my cat.___ you help me?

2. --______I borrow your ruler?

—Sorry, I don’t have one .Ask Peter. He ___ have one.

3.I____ play football with you. Because I___ finish my homework first.

4.She ___ sing this song in English.

5.The home cooking___ be more delicious.

6.—What are you going to do this Sunday?

--I’m not sure. I___ go for a picnic with my uncle.

7.___ I smoke here?

8.Lily___ come tonight, but she isn’t very sure.

9.—I can’t find my maths book. It___ be in your bag.

10.—Listen! Someone is knocking at the door.  Who ___ it be? Is it the postman?

--NO, it___ be him .It’s just seven o’clock.. It’s too early.