二、单项选择（共15题，每题1分，计15分）
从A、B、C、D四个选项中选出一个可以填入句中空白处的最佳答案。
( )21. –Who is ___ boy in a red cap? –He is Tom. He is good at playing ____ basketball.
A. the; / B. the; the C. a; a D. a; /
( )22. I’m busy in the evening, because there _______ lots of work to do.
A. has B. have C. is D. are
