1．        all kinds of difficulties，the workers have made rapid progress in the construction of the World Expo 2010Shanghai．（　　）
A．WithB．ForC．UnderD．Beyond
20．Collecting stamps as a hobby         increasingly popular during the past fifty years．（　　）
A．becomesB．becameC．has becomeD．had became
19．Not until the early years of the 19th century ________ what heat was．（　　）
A．man did knowB．did man knewC．didn't man knowD．did man know
18．The government has promised to do ______ lies in its power to relieve the hardships of the victims in the snow-stricken area．（　　）
A．howeverB．whereverC．whateverD．whichever
17．It is interesting how NASA（美国航空航天管理局）chose their astronauts for landing them on the moon．They chose men（16）Bthe age of twenty and thirty-five．There were about fifty of them，Many were（17）Bair pilots．（18）Cwere scientists with two or three degrees．NASA telephoned each man they were going to choose； told him the plans and the（19）A they might get in．They then asked him if he was willing to be trained as an astronaut．"How could any man（20）Dsuch an exciting job？"One of them said，"Dangerous？Of course．It's dangerous（21）Amost exciting"
The health and physical condition of（22）Cwas，of course，very necessary．（23）Bthose in very good health and physical condition were chosen．
While being trained to be astronauts．They went through many（24）CThey studied the star and the moon，and they also studied geology，the science of rocks．This was necessary（25）Bastronauts would have to look for rocks on the moon．They would try to find rocks which might help to tell the（26）Cof the moon．They were all（27）Bto fly in helicopters （直升飞机）．These helicopters landed（28）Ddown to give them some experience of the way the spaceship would（29）Dland on the moon，They were also taught the（30）Cfacts about the conditions in space．They learnt all the technical details of the spaceships and rockets．They visited the scientists and engineers who（31）Cthem．They visited the factories where they were（32）BThey learnt how every（33）Aof a space-ship and its instruments work．They also learnt every detail of ground-control（34）CIn a word，to be chosen as an astronaut．One must be in good health，（35）Din science and good at piloting．

16．A．atB．betweenC．ofD．on
17．A．experiencedB．oldC．trainedD．young
18．A．NoneB．FewC．OthersD．They
19．A．dangersB．sadnessC．hardshipD．troubles
20．A．acceptB．receiveC．offerD．refuse
21．A．butB．ifC．thoughD．however
22．A．the scientistsB．menC．pilotsD．Young people
23．A．AsB．OnlyC．IfD．Or
24．A．jobsB．placesC．coursesD．ways
25．A．forB．becauseC．sinceD．So that
26．A．storyB．BackgroundC．AgeD．name
27．A．shownB．trainedC．toldD．let
28．A．straightB．straightlyC．indirectlyD．directly
29．A．possiblyB．likelyC．actuallyD．really
30．A．not knownB．well-knownC．unknownD．known
31．A．drewB．producedC．designedD．made
32．A． repairedB．builtC．developedD．fixed
33．A．partB．movementC．machineD．body
34．A．houseB．stopC．systemD．station
35．A．well-doneB．well-fedC．well-keptD．well-informed
16．He didn't give up smoking _____ his doctor told him it was a matter of life and death．（　　）
A．except whenB．afterC．untilD．in case
15．---The hospital is on Culture Road．You can take Bus No.8to get there．
________．Thank you．（　　）
A．Heard itB．Made itC．Got itD．Known it
14．We were enjoying watching the football match on TV    the electricity went out．（　　）
A．thenB．asC．whileD．when
13．-You haven't said a word about my new cout，Brenda．Do you like it？
-I'm sorry，I _____ anything about it sooner．I certainly think it's pretty on you．（　　）
A．wasn't sayingB．don't sayC．won't sayD．didn't say
12．You _____ tell him．He is fully aware of the danger．（　　）
A．mustn'tB．don't needC．needn'tD．can't
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