Mr． Wang， must I come back to clean the classroom again？
No， you_____． I have asked Kate to do it．（ ）
A．mustn'tB．needn'tC．shouldn't
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 |
--- Who’s singing in the bathroom?
--- It ________ be Mr. Brown. Nobody sings like that except him.
| A．will | B．must |
| C．could | D．should |