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【单选题】

In 1969 two American astronauts _____ on the moon and walked on its rocky, dusty surface.
A.concentrate

B.based
C.landed
D.focused
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根据网考网移动考试中心的统计,该试题:

4%的考友选择了A选项

3%的考友选择了B选项

71%的考友选择了C选项

22%的考友选择了D选项

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