第一部分:英语知识运用(共两节, 满分30分)
第一节:单项填空(共20小题;每小题0.5分,满分10分)
从每题所给A、B、C、D四个选项中,选出可以填入空白处的最佳选项。
1.A subway is an effective way to solve traffic problems in_____big city. It has evident advantages, such as speed and convenience.
A.the; the B.a; the C.a; / D.the; a