1 . Don’t turn off the computer before closing all programs     you could have problems

A．or

B．and

C．but

D．so

2 . You and I could hardly work together, _____?

A．could you	B．couldn’t I
C．couldn’t we	D．could we

3 . Please do me a favor—   _______ my friend Mr. Smith to Youth Theater at 7:30 tonight.

A．to invite	B．inviting
C．invite	D．invited

4 . Every day ________ a proverb aloud several times until you have it memorized.

A．read	B．reading
C．to read	D．reads

5 . It’s the first time that he has been to Australia, _______   ?

A．isn’t he

B．hasn’t he

C．isn’t it

D．hasn’t it

6 . Help others whenever you can _______ you will make the world a nicer place to live in.

A．and

B．or

C．unless

D．but

7 .        a strange plant! I've never seen it before.

A．Which

B．What

C．How

D．Whether

8 .                   (比较这两把牙刷) and you’ll find the purple one is softer.(compare)

9 . Find ways to praise your children often,______you’ll find they will open their hearts to you.

A．till	B．or
C．and	D．but

10 . Don’t __________ (咳嗽) more than you can help.