题目内容


Astronaut Zhai Zhigang has become the first Chinese_____in space.
A．walkingB．walkedC．to have walkedD．to walk
D
考查：名词前被序数词修饰时，后用不定式作定语，句意：宇航员翟志刚已经成为了去太空旅行的第一位中国人。所以选D。
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