原题
录音 1
What can be inferred about cities before the Roman Empire?
ATheir buildings were not constructed with durable stone walls.
BTheir streets were difficult to navigate.
CTheir residential quarters were kept in areas outside the forum.
DTheir marketplaces were usually in the center of the city.
正确答案：B
解题思路
老师暂未填写解题思路。