二、单项选择（共15小题，每小题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. — Here is _________MP5 for you.
—Thank you. It looks like ________‘U’. I like it very much.
A. a; an B. an; an C. an; a D. a; a
22. — ______ the boys enjoy _______ the puppet (木偶) show of Yangzhou?
—Yes, they_______.
A. Does; watching; does B. Do; watch; do
C. Do; watching; do D. Does; watch; does
