It was (such a nice weather) that everybody enjoyed himself on the top of the hill.

问题描述:

It was (such a nice weather) that everybody enjoyed himself on the top of the hill.
为什么weather 要加a?

是such a 和 quite a 的固定搭配,在这里 a 不是一个,每个,某个的意义.
像 Don't be in such a hurry !hurry 在这也不可数.