it was five clock ( ) they climb up to zhe top of mountion 填什么啊 since when that until

问题描述:

it was five clock ( ) they climb up to zhe top of mountion 填什么啊 since when that until
这个的答案是since,我不懂

when
it was+ (时刻,或时间点)+ when sth.happened.当某事发生时,是几点钟或哪一年如:
It was 1997 when Hongkong returned to China.
It was five o'clock when we arrived at the small mountain village.
对比强调句型:It was at five o'clock that we arrived at the small mountain village.
注意 第二句 有 at
It+ is/ was+…+that…多用于强调.