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 26 the age of twenty and thirty-five. There were about fifty of them, Many were 27 air pilots. 28 were scientists with two or three degrees. NASA telephoned each man they were going to choose; told him the plans and the 29 they might get in. They then asked him if he was willing to be trained as an astronaut. “How could any man 30 such an exciting job?” One of them said, “Dangerous? Of course. It’s dangerous 31 most exciting”
The health and physical condition of 32 was, of course, very necessary. 33 those in very good health and physical condition were chosen.
While being trained to be astronauts. They went through many 34 . They studied the star and the moon, and they also studied geology, the science of rocks. This was necessary 35 astronauts would have to look for rocks on the moon. They would try to find rocks which might help to tell the 36 of the moon. They were all 37 to fly in helicopters (直升飞机)。These helicopters landed 38 down to give them some experience of the way the spaceship would 39 land on the moon , They were also taught the 40 facts about the conditions in space. They learnt all the technical details of the spaceships and rockets. They visited the scientists and engineers who 41 them. They visited the factories where they were 42. They learnt how every 43 of a space-ship and its instruments work. They also learnt every detail of ground-control 44 .
In a word, to be chosen as an astronaut. One must be in good health, 45 in science and good at piloting.
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Lots of waste has been dumped into the river,which has led to________.
A.lots of fish having been killed |
B.kill lots of fish |
C.lots of fish being killed |
D.lots of fish to kill |
There was a________ look on his face when he met with the________ problem.
A.confusing;confusing |
B.confused;confused |
C.confusing;confused |
D.confused;confusing |
The doctor is trying to save the patient by every _________________ means.
A.imaginative |
B.imaginable |
C.imaginary |
D.imagination |
Can you imagine the astronauts’___________ in space?
A.to walk |
B.to be walking |
C.walking |
D.to have walked |
It is difficult to imagine his _____________ the decision without any consideration.
A.accept |
B.accepting |
C.to accept |
D.accepted |