二. 单选（20题，满分20分）
21 ----How about going for a walk after supper?
-----___________.
A. No, I’m busy. B. Why do that?
C. Yes, let’s do. D. Good idea.
22. ----- How long have they _____?
----- They _______ more than twenty years ago.
A. been married; got married B. married; married
C. got married; were married D. got married; got married
