Question

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

Answer 1

D

試題分析：考查介詞短語。A忙碌；B上漲；C在逃，奔波；D在移動中。句意：當史蒂夫突然想起來他的手機落在辦公室的時候，火車已經開動了。故選D。