The health and physical condition of 7 was， of course， very necessary. 8 those in very good health and physical condition were chosen.
While being trained to be astronauts. they went through many 9 . They studied the star and the moon ， and they also studied geology， the science of rocks. This was necessary 10 astronauts would have to look for rocks on the moon. They would try to find rocks which might help to tell the 11 of the moon. They were all 12 to fly in helicopters （直升飞机）。These helicopters landed 13 down to give them some experience of the way the spaceship would 14 land on the moon ， They were also taught the 15 facts about the conditions in space. They learnt all the technical details of the spaceships and rockets. They visited the scientists and engineers who 16 them. They visited the factories where they were 17 . They learnt how every 18 of a space-ship and its instruments work. They also learnt every detail of ground-control 19 .
In a word ， to be chosen as an astronaut. one must be in good health， 20 in science and good at piloting
1.A.at B.between C.of D.on
2.A.experienced B.Old C.Trained D.young
3.A.None B.Few C.Others D.They
4.A.dangers B.sadness C.Hardship D.troubles
5.A.accept B.Receive C.Offer D.refuse
6.A.but B.if C.Though D.however
7.A.the scientists B.men C.pilots D.Young people
8.A.As B.Only C.If D.Or
9.A.jobs B.Places C.courses D.ways
10.A.for B.Because C.since D.So that
11.A.story B.Background C.Age D.name
12.A.shown B.Trained C.Told D.let
13.A.straight B.Straightly C.Indirectly D.directly
14.A.possibly B.Likely C.actually D.really
15.A.not known B.well-known C.unknown D.known
16.A.drew B.produced C.designed D.made
17.A. repaired B.Built C.Developed D.fixed
18.A.part B.Movement C.Machine D.body
19.A.house B.stop C.system D.station
20.A.well-done B.well-fed C.well kept D.well-informed
KEY： 1－5 ABCAD 6－10 ACBCB 11－15 CBDDC 16－20 CBACD
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