It was about 600 years ago____the first clock with a face and an hour hand was made.

来源：百度知道编辑：UC知道时间：2024/06/24 11:55:22

A.that B.until C.before D.when
请解释一下原因

选A，than后面的是个从句，指代的是主句中的it。

变成正常的主谓结构就是：The first clock with a face and an hour hand was made was about 600 years ago.
通常这种正常情况下主语过长的句子会用这种that从句，这样句子不会显得头重脚轻。

翻译what on earth was it about He was trouble and you ___him about it. Everybody was told about it,but i was left in the dark about it it was a long time before I though about that day again what was it about the pickle jar that left the narrator and his wife so moved? It's time something was done about the traffic problem downtown. A light was still on and the man waited until it went out.After about half an hour had passed, You forget it about it I was about to leave.