It was four o'clock in the afternoon ( ) he and his team reached the top of the mountain.答案是when 不是that 为什么是状语从句 不是强调句 如果把It was 和 that 去掉仍然句子成立

问题描述:

It was four o'clock in the afternoon ( ) he and his team reached the top of the mountain.
答案是when 不是that 为什么是状语从句 不是强调句 如果把It was 和 that 去掉仍然句子成立

少介词. It was at four o'clock ...

强调句特点是去掉it is 和that 依旧成立
这里
he and his team reached the top of the mountain (at) four o'clock in the afternoon
少一个at不成立,是先行词作状语的定于从句,不是状语从句