21. – What _______unusual pet! Where did you get it?
-In _______empty box at my door.
A. a; a B. a; an C. an; a D. an; an
22. You should do eye exercises with your eyes_______.
A. opened B. open C. closed D. close
23. - Whose blouses are these?
-I think they belong to_______.
A. he B．she C．her D．hers
24. My mother likes watching TV for _______every evening.
A. some time B. some times
C. sometime D. sometimes
