二、单项选择
21.—What __heavy rain it was！
—Yes, but I love___ air after it rains. It smells so fresh.
A. the; a B. a; the C. the; the D. a; a
22. —You may go to Milan for a free trip.
—It’s a very kind_____, but I really can’t accept it.
A. excuse B. offer C. promise D. decision
23. A conversation _____ a wise person is worth ten year’s study of books.
A. for B. like C. with D. to
