We’ll never forget this terrible accident and the damage has caused to the area.A. thatB.

问题补充：

We’ll never forget this terrible accident and the damage has caused to the area.

A. that

B. what

C. it

D. one

答案：

A. that

B. what

(答案→)C. it

D. one

解析：代词辨析。That指代可数名词单数或者不可数名词，后面要有定语修饰；it指代上文出现的同一事物；one指代可数名词单数，表示泛指。What是从句的引导词。本题的it指代the accident。句意：我们永远不会忘记那场可怕的事故和那场事故给这个地区带来的破坏。可知这里要指代this terrible accident，是特指，用it，故C正确。