91.(　　 ) ______(Dog)dog is ______ useful animal.

A. a, an　　　　 B. a, the　　　 C. the, a　　 　　　D. the, /

90.(　　 ) A talk on Chinese history __________in the school hall next Monday.

　　　　　 A. be given　　 B. has been given　 C. will be given　 D. will give

89.(　　 ) --I saw Betty go to Grandpa Li's home just now.

　　　　　 --Yes. She’s often seen _________ the old man with the housework..

　　　 　　　A: help　　　　　 B. to help　　　　 C. helps　　　　　 D. helped

88. --Alice, you ________ on the phone. --I' m coming. Thanks.

　　　 　　　A. want　　　　 B-. are wanted　　　 C. are wanting　　 .D. have wanted

87.(　　 ) The trees must _______three times a week.

　　　 　　　A. water　　　　 B. watering　　　　 C. be watered　　　 D.waters

86. --What do you think of the football match yesterday?

　　　　　 --Well, it' s surprising. The strongest team of our school ________.

　　 　　　　A. was beaten　　 B. won　　　　 C. scored　　　　 D. was filled

85.(　　 ) --Can I help you, sir? --Yes, I bought the radio here yesterday, but it ________.

　 　　　　　A. didn't work　　 B.won' t work　　' t work　　　 D. doesn't work

84.(　　 )--What did you do last night? --I _______TV with my family.

　　　　　 A. watch　　　　 B. am watching　　 C. have watched　 D. watched

83.(　　 ) The students will go to the Summer Palace if it ________tomorrow.

　　　　　 A. won' t rain　　 B. isn' t raining　 C. doesn' t rain　　 D. isn' t rain

82.(　　 )--Why not go to see the dolphin show with me? --Because I ________it.

　　　　　 A. saw　　　　　 B. will see　　　　 C. see　　　　　　 D, have seen