Asubwayisaneffectivewaytosolvetrafficproblemsin

问题详情：

A subway is an effective way to solve traffic problems in________ big has evident advantages，such as________ speed and convenience.

A．the；the  B．a；the

C．a；/  D．the；a

【回答】

C

知识点：冠词

题型：选择题