二、单选题 (共15小题，每题1分)
21. — Leo, I finally persuaded my mother.
— So we can go to the basketball club tonight.
A. All the best. B. Never mind. C. Well done! D. Good luck!
22. Assistance dogs are trained to help disabled to live more independent life.
A. /; a B. a; the C. the; the D. the; a
23. Paul was not allowed to work he was fully recovered from the flu.
A. since B. whether C. because D. until
24. — I wonder if I could read your new novel.
— No problem, the moment I ______ it.
A. write B. wrote C. will write D. have written
25. This is the first study to compare the effects of the new drug with its side effects.
A. beneficial B. specific C. powerful D. potential
26. She likes singing very much, but her parents desire that she literature.
A. studies B. study C. must study D. would study
