10. a. forgetting b. memorizing c. improving d. learning
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Are there intelligent (1) _____________ on the other planets in our solar system?
Maybe there are. In our (2) _________ galaxy there are millions of stars. Some must
have planets with (3) __________ like those on the earth. (4) ________ in space there
could be other thinking beings. They would probably look (5) ___________ different that
we might not (6) _____________ them as people. However, (7) ___________ their
planet is older than our planet, they may know more than (8) ______. They may have
more progress ( 9) _______ some aspects. They may be traveling in space and be (10 )
__________ human beings.
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