16、The oral test makes up20%____ the final exam.　　 　A. on　 B. to　 C. of

15、_____ there is something in this box.　　 A. May be　　 B. Maybe　　 C. May

14、--What is behind the tree? 　--There must be a dog ______ there.

A. to sit　 B. sit　 C. sitting

13.You should be careful ____ the dog that doesn’t bark. A. of　　 B. for　 C. on

10.(　 )It’s so cold and you’ve walked a long way. You ________be tired.

　’t　 B. might　 C .must　　 C. can

(　 )11 We were late for class ____ the heavy rain.　 A. because　　 B. because of　 C. so

(　 )12 I didn't come to school yesterday____ I had to look after my grandmother at home.

A. because　　 B. because of　　 C. since

8.(　 ) ---Must I finish my homework now?-- No, you ____. You may have a rest first.

　A. mustn’t　 B. can’t　 　C. may not　 D. needn’t

(　 )9-Why is the man running in the street? 　--He _____ for exercise.

A. might run　　 B. might be　　 C. might be running

7.(　 )The headmaster _______be in the office because the light is off.

　A. can’t　 B might　 C. could　 D. must

6.(　 )He pretends _______this thing.

　A. not know B. not knowing C .not to know D .to know not

4.(　 ) You’d better not read today’s newspaper because there is _________in it.

　A. something interesting B. anything new C. important thing D. nothing special

(　 ) 5 There is _____ rain and it's ____ cool in summer.

A. too much, too much　　 B. too much, much too　 C.much too, much too

3.(　 ) --Whose T-shirt is this? --It ___ be John's. It's too small for him.

A. must　　 B. might　 C. can't