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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:864

The old couple walked rather slowly, and could be seen, from time to time, to stop and rest, ________ out to sea.

A.to be staring B.stared
C.having stared D.staring
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Theoldcouplewalkedratherslowly