1 . Your homework is all right, ________, you can do it better, in my opinion.

A．but

B．besides

C．while

D．however

2 . —What happened to Tom?
—He was crossing the street   ________ a motorbike hit him from behind.

A．while

B．when

C．until

D．because

3 . I do all the housework __________ Jim just does the dishes now and again. It’s unfair!

A．since

B．though

C．while

D．although

4 . —What do you think of Alan?
—________ I accept that he’s not perfect in many respects, I do actually like him.

A．While

B．As

C．Since

D．However

5 . He wants to be a doctor ________ his parents want him to _______ the army.

A．while, join

B．when; join

C．while; join in

D．when; join in

6 . — Mom, I’m leaving for Beijing tomorrow.
— That’s nice. You’d better ring me up________you get there.

A．as soon as

B．until

C．while

7 . —How much should I pay for these magazines?
—The first one is free, ________the second one costs five yuan, Sir.

A．when

B．while

C．although

8 . About 70-80 percent of people dream in color,_____others dream only in black andwhite.

A．while

B．although

C．when

D．however

9 . I am good at drawing ______ he does well in reading.

A．as

B．for

C．while

D．when

10 . The south of the country gets richer         the north gets poorer.

A．so

B．because

C．when

D．while