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【单选题】
The large size and roughly circular shape of the Pacific made some scientists think that it ______ a hole left when the moon separated from the earth.
A.used to be
B.would have been
C.might have been
D.should have been
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根据网考网移动考试中心的统计,该试题:
10%
的考友选择了A选项
19%
的考友选择了B选项
68%
的考友选择了C选项
3%
的考友选择了D选项
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