The train is running ________ 120 kilometres an hour.[ ]A. at a speedB. at the speedC. at a speed of

题目简介

The train is running ________ 120 kilometres an hour.[ ]A. at a speedB. at the speedC. at a speed of

题目详情

The train is running ________ 120 kilometres an hour.
[     ]
A. at a speed  
B. at the speed
C. at a speed of  
D. on a speed of
题型:单选题难度:中档来源:同步题

答案

C

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