一．单项选择（每题1分，共计30分）
( )1. --What’s the matter ______ your bike?
-- It’s broken.
A. to B. on C. about D. with
( )2. The news is very important. You should ______ on the paper.
A. write it down B. write down it
C. write them down D. write them down
( )3. You are so noisy, boy. You have to ______ be quiet.
A. try to B. try not to C. tries to D. tries not to
