When did you him?A. knowB. knowingC. get to knowD. get to knowing

问题补充：

When did you him?

A. know

B. knowing

C. get to know

D. get to knowing

答案：

A. know

B. knowing

(答案→)C. get to know

D. get to knowing

解析：know是持续性动词。一般不用when来提问持续性动词，而get to know就解决了这问题，D项语法结构错误。