Ⅰ. 用所给词的适当形式填空（10分）
1. Jenny sang the music with her hand waving _____ (gentle).
2. When I got home, I saw my sister _____ (do) her homework.
3. We _____ (leave) in two hours.
4. There are four _____ (season) in a year.
5. I _____ (change) my clothes and went downstairs.
Ⅱ. 单项选择 (10分)
1. If you have enough time you’d better visit them one _____ one.
A. in B. of C. with D. by
