It costs __ to travel by air as by train.[ ]A.more three timesB.as much tree times C.three times as

题目简介

It costs __ to travel by air as by train.[ ]A.more three timesB.as much tree times C.three times as

题目详情

It costs      __    to travel by air as by train.      
[     ]
A.  more three times    
B.  as much tree times  
C.  three times as much
题型:单选题难度:中档来源:同步题

答案

C

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