29 It is necessary that she ______ now.
A. went B. should go C. gone D. goes
31 You should have your car ______ before going.
A. servicing B. service C. serviced D. to service
32 It is very wise of you ______ after the event.
A. been B. be C. to be D. being
85. You can smoke in here ______ you leave a window open to let the smoke out.
A. if B. unless C. whether D. until
86. Sylvia won't lend you any money ______ you promise to pay him back.
A. provided B. unless C. providing D. as long as
99. I'll have another key ______ .
A.to make B.making C.make D.made