— I think the man over there must be Bob.
— It _______ be him. He has gone to England.
| A．can’t | B．mustn’t | C．couldn’t | D．shouldn’t |
—What about _______ a rest?
—OK. Let’s go out and have a walk.
A. to take B. takes C. taking
—Have you ever been to Shanghai?
—Yes. I _______ there a few months ago.
A. have been B. went C. have gone
_______ nice hat it is!
A. How B. What C. What a
—When were you born?
— I was born_______ a cold winter morning in 1996.
A. on B. in C. at
When I came back yesterday evening, my brother _______ his homework.
A. is doing B. has done C. was doing