Frank knows much about the city because he ______ there many times．（ ）
A．wentB．has goneC．has been
—I saw Mr. Wang at school just now.
--You ____________ make a mistake. He has gone to Shanghai and won’t get back until next Monday.
| A．may | B．might |
| C．must | D．need |
This book ___ be yours. Look! Here is your name.
| A．would | B．should |
| C．must | D．may |
– Listen ! Is Professor Johnson giving a report in the hall?
– No, it _______ be him. He has gone to America.
| A．needn’t | B．can’t |
| C．may not | D．mustn’t |
You ________ cross the road when the traffic lights are red.
| A．can | B．must |
| C．mustn’t | D．needn’t |
---- go swimming with Dad , Mum? ----No ，you needn’t. You can go bike riding.
| A．Must | B．May |
| C．Would | D．Can |