---Whose notebook is this?
--- It ________ belong to Lucy. Look, her name is in it.

–       I wait for him here?  - NO , you needn’t 

---I think Miss Lin must be in the library. She said she would go there.
---No, she __________be there. I have just been there.

---Listen! Is Kitty in the next room?  ---No, it ______ be Kitty. She has gone to Beijing.

You       be tired after one hour’s walk . please stop to have a rest.
A. need         B.must              C.can

Lily can swim. What ________ you do?  ----- I can skate.
A. can          B. do           C. are

--- Another cup of coffee?
---No. thanks. I _____ be off. Marry is waiting for me.

He____know the answer, but I’m not sure.

— Must I come at four o’clock?
— Oh, no, you ____.

---________ we clean the classroom at once?
---No, you________. You ________clean it after school