4.When we do exercises, we must be _________.

　　 A. as we can as careful　　　　 C. as we can as carefully

　　 C. as careful as we can　　　　 D. as carefully as we can

3.What’s ______ way of saying lab?

A. other　　　 B. others　 C. another　　　 D. the other

2.There are _______ people at the meeting.. Please ask some for me.

　　 A. a little　　 B. few　　 C. little　　　　　 D. a few

1.It’s ________ to stand at the top of such a tall building.

　　 A. careful　　 B. easy　 　C. beautiful　　 D. dangerous

6.I think physics is more difficult than math.

　　　 I think math is _______　 _______ difficult _______ physics.

5.What are you doing now ?

　　　 What are you doing ______　 _______　 ________?

4.We’ll start if it is fine tomorrow morning.

　　　 We’ll ______　 ______ if it fine tomorrow morning.

3.The bus ran slowly and at last it stopped.

　　　 The bus ran slowly and at last it ______　 _______　 _______　 ________.

2.He is looking for his watch everywhere.

　　　 He is looking for his watch ______　 _______　 _______.

1.There are over 2000 passengers at the station.

　　　 There are ______　 ______ 2000 passengers at the station.