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^)5.oftheproblemsworkedoutbytheboyatlast.A.Threefourths;wasB.Threefourths;wereC.Thirdfourths;wasD.Thirdfourths;were

题目详情

^ ) 5. of the problems ____ worked out by the boy at last.

   A. Three fourths;was   B. Three fourths;were

   C. Third fourths;was   D. Third fourths;were

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答案和解析
5.B5.B