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▲ 閱讀下文,回答第 1 − 5 題It is interesting to learn about how astronauts are chosen to go to the moon. Someastronauts are 1 air pilots who enjoy flying in the sky. Many of them are scientists withmore than one degree. They are usually chosen 2 their twenties and thirties. The physicalcondition of pilots cannot be emphasized more in this 3 . Only those in very good healthand physical condition are chosen. While being trained to be astronauts, they have to 4 manycourses to gain knowledge about the moon. For example, they have to study science of rocks.This is necessary because astronauts will have to look for rocks on the moon. Among all therocks they have found, they will have to study specific patterns of rocks that would helpthem 5 the age of the moon. That is one of the important missions for astronauts.
1.
(A) enclosed
(B) experienced
(C) expired
(D) evacuated

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