【题目】______ what had happened, they knew I would struggle and simply wanted to help because it was the right thing to do.
A. HearingB. To have heardC. Having heardD. Heard
在线课程【答案】C
【解析】
考查非谓语作状语。句意：听到发生的事情之后，他们知道我会努力，他们只是想帮忙，因为这是正确的事情。分析句子可知，本句的主语是they，与动词hear是主动关系，空格发生的事是在they knew之前，因此要用完成时，故选C。