A. as B. by C. at D. for

New officers ______ by our club when we hold our next meeting. A. will elect B. elect C. will be electing D. will be elected

The Bill of Rights is the term for the first ____ amendments to the Constitution. A. ten B. eleven C. twelve D. thirteen

Which preposition is most suitable in the sentence, ‘ A drowning man will clutch ______a straw.’? A. at B. for C. with

Conversation 1 15. A. Visit a patient. B. See a doctor. C. Meet a friend D. Look for a dentist

The question is ________ we will have our sports meet ing as planned next week. A. that B. if C. when D. whether

The nurse _____ on a night shift for several weeks. A. is working B. works C. worked D. has been working

In previous times, when fresh meat was in short __, pigeons were kept by many households as a source of food. A. store B. provision C. reserve D. supply

下列选项中抗凝血酶HI（AT-DI)活性增高的是A.妊娠期妇女B.新生儿C.血友病D.慢性肝炎E.肝硬化

A. of B. for C. with D. in

◑She couldn’t decide whether to stay or ___for Nanjing at once。◑A. left◑B. will leave◑C. leaving◑D. to leave

◑___alone, I turned on the radio for company。◑A. Be◑B. Been◑C. Being◑D. Having been

A. on B. with C. after D. by

根据所听到的内容回答题__________ A. In a post office. B. At an insurance company. C. On an airplane. D. In a movie company.

A. as B. for C. on D. about

◑— Excuse mc, are you waiting for the bus?◑— Yes, I am. But the bus is so late.______, how can I get to No.1 Middle School?◑A. In the way◑B. On the way◑C. Out of the way◑D. By the way

This math problem is _________ thatone. [ ] A. so easy as B. as difficult as C. much difficult than D. less easier than

A typhoon swept across this area with heavy rains and winds strong as 113 miles per hour. [ ] A. too B. very C. so D. as

We must do it well, ________ there are a lot of difficulties. [ ] A. as if B. as though C. even though D. even as

A. as B. about C. for D. in

BY-2型荧光灯晶体管逆型器电路的反馈方式为（)。A.电流反馈B.电压反馈C.混合反馈D.不确定

A. to speak B. for speaking C. to speaking D. to speaking of

It is hard to avoid mistakes. __ you correct them carefully, it will be all right. A. In the case B. As long as C. Although D. Despite

若直线ax+2by-2=0（a＞0，b＞0）始终平分圆x2+y2-4x-2y-8=0的周长，则[1/a]+[2/b]的最小值为（　　） A. 1 B. 3+22 C. 5 D. 42

道岔挤岔时，ATS站场图上显示状态为。A.道岔编号红色闪烁B.道岔编号红色边框+紫色闪烁C.道岔紫色闪烁D.道岔粉红色闪烁（）