______ was not long before the whole country rose up.

A.There    B.It    C.This    D.That

为什么不选A？

It was not long before the whole country rose up.

参考译文：没有过多久，全国开始造反/起义。

回答如下：

答案解析为B为正确答案（it指代时间 )

(1)It is/was not long before +从句，意思”没有过多久就....

It was not long before tragedy struck again.

没多久，灾难又再次降临。

(2)It is/was long before +从句，意思“过多久才.....”

It was a long time before she tumbled to what I meant.

她用了很长时间才明白了我的意思。