What do you think of working as a doctor？
It 's a good job to help people keep___________．（ ）
A．busyB．strictC．healthyD．generous
—Mum, may I draw some flowers on the wall?
—Oh, no, dear, you _______. Why not draw your beautiful flowers on the paper?
| A．needn’t | B．can’t |
| C．won’t | D．couldn’t |
—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 |