Ⅰ.单选。（1*20=20%）
( ) 1.--- do you improve your listening?
---I improve it listening to tapes.
A. How; with B: What; with C: How; by D. What; by
( ) 2. _________ should not be allowed to go out at night .
A. Fifteen-years-old B. Fifteen-year-olds
C. Fifteen year old D. Fifteen years olds
