请帮我看看这道题 the war and the suffering that it caused______him very much

题目

请帮我看看这道题 the war and the suffering that it caused______him very much
A.affected B.to affect C.effect D.affecting
能给我好好讲讲吗?其他选项为什么不行

答案

首先明确句子的结构.the war and the suffering 是主语,that it caused 是定语,修饰the suffering的,战争以及由战争引发的苦难,这是主语,him是宾语,所以缺一个谓语,并且是一般过去时,这里只有a对了