Question

【题目】It was five o'clock in the afternoon __________ they climbed up to the top of the mountain.

A. since B. when C. that D. until

Answer 1

【答案】B

【解析】考查状语从句。句意：当他们爬上山顶时已经是下午五点了。由"five o'clock in the afternoon"可知空格后应为时间状语从句，结合句意可知选B项。