Question

She often goes to work __________     .

A．by a underground

B．by underground

C．by the underground

D．take the underground

Answer 1

B

试题分析：句意：她经常坐地铁上班。短语by underground坐地铁，中间不需要冠词；或者可表述为She often takes the ground to work.结合语境故选B。