A-A+
______ one time Manchester was the home of th
问题详情
______ one time, Manchester was the home of the most productive cotton mills in the world.
A．On
B．By
C．At
D．Of
参考答案
正确答案：C
解析：本题测试习惯用法。at one time为固定介词短语，意思为“从前有个时期”或“曾经”，符合句意。故C正确。
考点：
问答库
