90.Tom kept quiet about the accident ___lose his job.

A. so not as to　　 B. so as not to

C. so as to not　 D. not so as to

89.-Shall we go skating or stay at home?

　　　 -Which _______do yourself?

　　　 A. do you rather　 B. would you rather

　　　 C. will you rather D. should you rather

87.(　 )I don’t think it advisable_______.

A.　 your studying　 math B. you to study math C. for you to study math D. of you to study math.

(　 )88 It is foolish ______such a mistake.

A.　 for me to make B. for me making

C. of me to make D. of me making

86.(　 )He is said _____for five years.

A.　 to have died　 B. to die

C. to have been dead D. dead

85.After seeing the movie.____.

A.　 the book was read by him

B.　 the book made him want to read it

C.　 he wanted t read the book

D.　 the reading of the book interested him

84.(　 　)The lecture began by _____us where the island was and went on _____about its history.

　 A. telling ,talking　 B. to tell ,to talk

　 C. telling , to talk　 D. be told ,talking

83.(　 　)The sentence needs ______.

A.　 to improve　 B. improve C. improving

D .improved

82.As she is looking forward to ______from me ,please remember _______this letter on your way to school.

　 A. hear ,post　 B. hearing ,to post

　 C. be heard ,posting D. be hearing, to posting

81._____from the moon ,our earth ,with water ______seventy percent of its surface, appear as a “blue ball”

A.　 See ,covered　 B. Seeing ,covering

C. Seen ,covering D. To see, to cover

80.( 　)A person _____a foreign language most be able to use the language ______all his own.

A.　 learning ,forgetting B. to learn, to forget

C. using ,but　　　　 D. who learns ,to forget