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the young man ____10,000 miles so far. A has covered B had covered C covered.选哪个,为什么?谢谢

题目详情
the young man ____10,000 miles so far. A has covered B had covered C covered.选哪个,为什么?谢谢
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答案和解析
A so far 到目前为止,这个短语常跟现在完成时态.