21. —What about seeing the new movie at the theatre tonight?

   —Sounds great, but I ____ work extra hours to finish a report.

A. have got to                B. am able to  

C. am glad to                 D. am willing to

22.Having lived in China for 8 years,Helen has a good____ of both English and Chinese.

A. program      B. guidance     C. command     D.ability

23. ____from his expression, he is leading a happy life.

A. Judged      B. Judging     C. Being judged    D. Judge

24.The professor with ____you talked just now is very famous.

A. who         B. that             C. whom          D.which

25.Only when you are peaceful in your heart ____your problem.

A. can you find  B. you can find    C. did you find   D. you found