34. Three years ______ since we met last.

A. have passed    B. has passed    C. passed    D. has past

33. The singer and pianist _______ asked to make a speech at the meeting yesterday.

A. is    B. was    C. are   D. were

32. ― Who else is in the classroom?

― ________ .

A. Nothing    B. Not one    C. No one    D. Not anything