[题目]Scientists are working hard to make possible for people to live on Mars in the future.A.itB.thatC.thisD.one 题目和参考答案——青夏教育精英家教网—

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【题目】Scientists are working hard to make __________ possible for people to live on Mars in the future.
A.it
B.that
C.this
D.one

【答案】A
【解析】句意：科学家正在努力使未来人们住在火星上成为可能。it 可做形式宾语，代替真正的宾语to live in the future。所以选A。

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