In the following words, which underlined（下划线的）letters have a different sound from the others?
| A． |
birth |
B． |
either |
C． |
earth |
--- Lin Tao, can I use your English dictionary?
--- Sure. But you _______ return it before the class.
| A．must | B．can |
| C．may | D．would |
--What are you going to do tonight, Cindy?
--I’m not sure. I __________go to see a movie with my friends.
| A．must | B．should |
| C．might | D．have to |
—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 |