二．单项填空（共15小题，每小题1分，满分15分）
21. —Is that __________ hat?
—No, it’s not ____________. It’s ______________.
A. your; my; Tom’s B. your; mine; Tom’s
C. yours; mine; Tom D. yours; mine; Tom’s
22. There is ____________ cat in the house. Is _____________cat yours?
A. the, a B. the, the C. a, the D. a, a
23.—It’s a fine day today. How about_____________？
—Sounds great!
A. go hiking B. go to hike C. going hiking D. to go to hike
24. What will your school be like ___________20 years?
A. after B. by C. in D. at
