快...1.The math problem was very difficult for him,but he ___ it ___.A.worked;on B.worked;outC.worked;with D.worked;for2.The channel ___ ___ ___ (使可能成为) to travel by train from Paris to London

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快...1.Themathproblemwasverydifficultforhim,buthe___it___.A.worked;onB.worked;outC.worked;withD.worke

快...1.The math problem was very difficult for him,but he ___ it ___.A.worked;on B.worked;outC.worked;with D.worked;for2.The channel ___ ___ ___ (使可能成为) to travel by train from Paris to London
快...
1.The math problem was very difficult for him,but he ___ it ___.A.worked;on B.worked;out
C.worked;with D.worked;for
2.The channel ___ ___ ___ (使可能成为) to travel by train from Paris to London

快...1.The math problem was very difficult for him,but he ___ it ___.A.worked;on B.worked;outC.worked;with D.worked;for2.The channel ___ ___ ___ (使可能成为) to travel by train from Paris to London
1 B 算出来
2 makes it possible

选B
做出来了
made it possible

  1. B

  2. makes it possible