四、单项填空(共13分,每小题1分)
从下面各题所给的A、B、C、D四个选项中,选择可以填入空白处的最佳选项.
22. I have a big brother. __________name is Paul.
A. His B. Her
C. He D. Your
23. I sometimes help my mom with her housework____________ Saturdays.
A. at B. in C. on D. to
24. I’d like to go with you, _____________I’m too busy.
A. or B. and C. so D. but