问题
选择题
When Steven suddenly remembered that he had left his mobile in the office, the train was already
________.[ ]
A. on the go
B. on the rise
C. on the run
D. on the move
答案
答案：D
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When Steven suddenly remembered that he had left his mobile in the office, the train was already
________.[ ]
A. on the go
B. on the rise
C. on the run
D. on the move
答案：D