You’dbettergotherebytrain.Thetrainticketis

问题详情：

 You’d better go there by train. The train ticket is _____ the airplane ticket.

A. as cheap three times as               B.  as three times cheap as        

C. three times cheaper than               D.  cheaper three times than

【回答】

C

知识点：固定句型

题型：选择题