第二部分 笔试部分（满分80分）
Ⅴ．单项填空：从A、B、C、D四个选项中选出最佳答案。（每小题1分，共15分）
( )21. It’s 11:30. My mother is cooking. My brother and I _____.
A. is watching TV B. am watching TV C. are watching TV D. watch TV
( )22. —It’s time _____ supper.—OK, Let’s _____ .
A. for; to go B. for; go C. for; going D. to; go
( )23. —_____ do you usually come to school? —_____foot.
A. How ; On B. What ; On C. How ; By D. When ; By
