22) At last, they ____ get through the mountain in such a heavy rain.
A. can B. could C. are able to D. were able to
C. READING
Read the passage carefully and choose the correct answer for each blank.
ON THE MOON
In 1969, the first astronauts from Earth (23) ... on the Moon. They
had prepared for the trip for a long time and knew their mission involved doing
things that had never been done before. The astronauts wore special heavy boots to
(24) ... them from floating off into space. On the Moon, they had time to
(25)... Moon rocks and soil samples before returning to Earth. Those brave
people, and others after them, are (26)...for much of the knowledge we now
have about how the Moon was formed. It is likely that scientists will continue to
learn more about how the galaxy was formed by studying the data (27)...
back from the Moon.
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