单项选择题

In his ______ to further his knowledge of the universe, man has now begun to explore space.

[A] attempt
[B] expedition
[C] trial
[D] chase
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单项选择题
The ______ of a cultural phenomenon is usually a logical consequence of some physical aspect in the life style of the people.
[A] implementation
[B] manifestation
[C] demonstration
[D] expedition
单项选择题
Nowhere but in the continuous research work ______ find the meaning of his life.
[A] for him to
[B] he can
[C] he could
[D] can he
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