34. According to the passage, why are scientists working on the expandable space habitats?
(A) To deal with Hollywood.
(B) To deal with financial issues.
(C) To deal with the maze.
(D) To deal with engineers.

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統計: A(2), B(47), C(8), D(7), E(0) #1308521

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#4713027
節省金錢成本。第二段幾個句子可以判斷: ...
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