you didn't really expect the President to () your letter,did you?

问题描述:

you didn't really expect the President to () your letter,did you?
A.responding to
B.responded to
C.respond of
D.respond to
为什么不能选B呢?

D
expect sb to do sth 期待某人做某事,固定搭配
to respond to one's letter 回信,固定搭配