30. Do you know the teacher_______told us the answer just now ?.

A. which　 B.whom　 C.what　 D.who

29. I’m not sure ______________________.

A.when will he come back　　 B.where does he work

C. why he didn’t do that　　　 D.whose is the key

28. ________news it is! We’re so pleased.

　 A. What bad　 B. What good　 C. How good　 D.How bad

27. I’m so tired.Let’s stop_______.I’m not used to______this kind of job.

　 A. to work; do　 B. working; do　 C. working; doing　 D. to work;doing

26. We’ll go to the beach if it __________tomorrow.

A. doesn’t rain　 B. don’t rain　 C.won’t rain　 D.isn’t rain