21.As she loved animals so much, she found a job as __ animal trainer after leaving ___ college£®
   A£®an; /      B£®an; the       C£®the; the       D£®the; /

22. £­Sorry to have knocked you down.

£­________. You didn’t mean to, did you?                           

A. Forget it.        B. No problem.   C. All right.     D. Don’t say so.