In 1969, the first astronauts from Earth landed on the Moon. They had prepared for the trip carefully and knew that their mission (28) doing things that had never been done before. The astronauts wore special boots to prevent them (29) space. On the Moon, they had time (30) floating off into Moon rocks and soil samples before returning to Earth. Those brave people, and others after them, are responsible for much of (31) knowledge we now have about how the Moon was formed. It is likely that to learn more about how the galaxy was formed by studying the data scientists (32) from the Moon. brought bac
1
A. consisted
B. involved
C. concluded
D. insisted
2
A. from
B. out
C. of
D. at
3
A. collect
B. collects
C. to collect
D. collected
4
A. a
B. some
D. few
5
A. continued
B. were continue
C. continue
D. will continue
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