I.单项选择（每题1分，共15题，15分）
21. There is ____“u”and ____“l”in the word “ruler”.
A. an ; a B .an ;an C.a ; an D. a , a
22.John likes playing ____f ootball, but he doesn’t like playing______piano.
A.the ; the B. /; the C. the ;/ D. a ; the
23. —May I speak to the headmaster?
—He ____a meeting now. Can I take a message?
A.is having B. had C. has D. will have
24. Mr. Brown often ____to work after ______breakfast.
A. goes ; the B. goes ; / C. go ; the D. go ; /
25. —Can your brother play chess?
—Yes,but he ____ play ____.
- can ; good B. can’t , good C. can’t ; well D. can ; fine
