— I think the man over there must be Bob.— It _______ be him. He has gone to England.

— Must I feed the goldfish now? — No, you ______. But you must do it before supper.

Sometimes we have much homework to do, but not often. Anyway, it ______in time.

—I want to know if I _______________smoke here. —No, you ______________. Could you see the sign “ No Smoking” there?

A: Listen! Is it Linda singing in the next room? B: No, it __________ be her. She is still in Shanghai.

He ________be at home because the light in his room is on.

That man ________ be Mary’s father, as he is much taller.

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

---Look at the boy running on the playground. Is it David? ---It ______ be him. I saw him go to the teachers’ office just now.

----- I want to know if I _________ smoke here. ----- No, you ___________. Can’t you see the sign “NO SMOKING” there?

This lift __________ only hold 12 people. It’s full now. We ________ wait for some more time.

I hear you've got some new Australian coins. __________ I have a look?

—Look，your father is playing the piano over there.—He________ be my father. He has gone to Beijing.

------Is this ruler Mary’s?------No, it _______Mary’s. Hers is on the desk..

You ______ do it if you really don’t want to.

--______you swim? -- No, I can’t. 

– Do you know whose book this is?—Let me have a look . It      Wei Fang’s . Look, here is her name.

---I argued with my best friend yesterday and I don’t know what to do now. ---Maybe you _______ say sorry to her.

— My  clothes are out of  style.-—Maybe  you  should  ______ some new clothes.

-----Look! The girl dancing in the gym ____ be Joe. She is the girl who loves dancing too much, you know. ----- No, it ____ be her. Joe has gone to Shanghai.