1.when I arrived at the hospital,he_____in the emergency room.
A. was being treated B. was treated C.had been treating D.had been being treated

2.they have just bought a new villa_____sitting room,you can see a huge garden.
A. from the B. whose C.from whose D. with a

3.After he regained consciousness,he seemed_____about the car crash.
A. to forget completely B.to have completely forgotten C. forgetting completely D. having completely forgotten

4.______any foreign language and having no special skills, he finds it hard to get a job in this very competitive world.
A. Knowing not B.konwing no C. not knowing D.having known no

5.you should discuss your idea with your classmates because just______it to someone else helps you sort it out for yourself.
A.have to explain B.having to explain C. have explained D.having explained

6.that his aunt Ada could ever have been considered pretty seemed____belief.
A. off B. beyond C. out of D.without

7.the name began with a B,though he couldn't ________exactly what the name was.
A.make of B. make sense C. make up D.make out

8.we should do all___A__is useful to the people.
A. that B. which C.what D.as

9.The question is __C__you should do next
A.that B.where C.what D.why

10.he wasn't appointed chairman of the commitee,____C _not very popular with all its members.
A. to be considered B. considering C. being considered D. having

11.The team looks good tonight because the coach had them_____A__every night this week.
A.practice B. practicing C. practiced D.to practice

12.I felt somewhat disappointed and was about to leave,___B__something occurred which attracted my attention.
A.unless B. when C.while D.until

13.We are all for your proposal that the discussion_A___
A.be put off B.was put off C.should put off D.is to put off

14.All flights_ C____because of the snowstom,many passengers could do nothing but take the train.
A.had been canceled B. have been canceled C.having been canceled D. were canceled

15.How we ____A___a chance to visit your country!
A.longed for B.looking for C.waited for D. went for

16.I've never been to beijing ,but it's the place____B_
A.where I'd like to visit B. I most want to visit C. in which I'd like to visit D.that I want to visit it most

17.Space exploration has been made__D_____-with the development of modern science and technology.
A.it possible B.it was possible C. that possible D. possible

18.Tell him to finish his work first,_____C___he come this afternoon.
A.if B.were C. should D. had;

要简单解析，谢谢！

1-5.DDBCD
6-10.DAACC

1、事情是发生在过去的前面，所以要用过去完成式，再一点，人是被救治的。
2、with a 表示带着休息室的。
3、seemed to……固定的搭配，再说是已经忘记
4、倒装句
5、because后面跟的是一句完整的句子
6、ada注重信心，再后来才会去考虑外表
7、make of 是组成的意思
8、what做宾语又做主语
9、what做什么