Question

【题目】The magic show has been on 20 minutes. It has been on 2.p.m..

A. for, since B. in, since C. for, for D. since, for

Answer 1

【答案】A

【解析】

试题分析：句意：魔术表演了二十分钟了，是从下午两点表演的。前句“二十分钟”是时长，用介词for引出；后句，“下午两点”是时间点，用since表示自从……。故选A。