These planes can fly than the old ones. A.as fast three times B.three times as fast C.three times——青夏教育精英家教网—

摘要：These planes can fly than the old ones. A.as fast three times B.three times as fast C.three times fast D.three times faster

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These planes can fly ________ than the old ones．

A．as fast three times

B．three times as fast

C．three times fast

D．three times faster

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