88. ---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

89-Why is the man running in the street?　 --He _____ for exercise.

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

90 We were late for class ____ the heavy rain.　

A. because　　 B. because of　 C. so

91I didn't come to school yesterday____ I had to look after my grandmother at home.

A. because　　 B. because of　　 C. since

86.It’s so cold and　 you’ve walked a long way. You ________be　 tired. Have a rest. please.

　’t　 B. might　 C .must　　 .C. can

87The books belong to ____.　　 A. him　 B. his　 C. he's　 D hers

85.It’s too late ,I ________go home now, or my parents will be angry with me.

　A, have to　 B. have　 C. may .　 D. can

84.In　 the dark street, there wasn’t a single person _____she could ask for help.

　A. that　 B. from whom　 C .whom　 D .to whom

83.The　 headmaster _______be in the office because the light is off.

　A. can’t　 B might　 C. could　 D. must

81.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

82He pretends _______this thing.

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

80.If I ______you, I would give some flowers to her.

　A. am　 B .was　 C ,are　 D .were

79. The woman said she saw the thief ____from the shop.

　 A,　 escaped　 B. escape　 C escapes　 D. to escape

78.Tonny is afraid ______, because he was bit by a dog.

　 A. fly　　　　　　　　 B. to flying　　　　 C. flying　　　　　　 D. of flying

77.He ______ would do great thins should not attempt them all alone.

　 A. whom　　　　　　　 B. who　　　　　　 C. whose　　　　　　 D. which