填入适当的单词补全对话。
Henry: Hi, Bob. What do you usually doweekends?
Bob: I usually exercise. about you, Henry?
Henry: I usually go shopping in the supermarkets with my parents.
Bob: I can't stand shopping. It's a waste of time, I think.
Henry: But I really liked it. How do you exercise?
Bob: I exercise foura week at school. Do you often exercise?
Henry: very often. I have a lot of things to do every day, you know.