35. --Let's go shopping after school.

　 --__　　　 Call for me at any time.

　　 A. That depends.　　　 B. Hold on, please.　 C. What for?　　　 D. Sounds good.

34. -- Where have you been all day?

　 　--We 　　__ some lovely children and couldn't get away from them until it was dark.

　　 A. meet　　　　　　　 B. have been met　　 C. met　　 D. have been meeting

33. At first, the speaker was referring to the problem of pollution in the country but halfway in his speech, he suddenly __　　　 to another subject.

A. committed　　　 B. switched　　　　 C. attached　　　　　　 D. transmitted

32. When asked to explain 　　　　　　he does to make his students so fascinated with his lessons, the teacher paused and thought deeply.

　 A. what it is that　 B. that what it is　 C. what is it that　 D. that what is it

31. The scientists were surprised that a child should work out the problem _　　 _ they themselves couldn't.

　　 A. unless　　　　　 B. since　　　　 　　　C. while　　　　　 D. although

30. As I arrived in Sydney, I wanted to see everything on my first day, __　　 I　　

A. that　　　　　　 B. where　　　　　　 C. when　　　　　　 D. which