I. 单项选择(10分)
( )1. -When did you get your first pair of skates?
-_______.
A. For 6 years B. Since I was 7 years old.
C. When I was 7 years old.
D. Since 6 years ago.
( )2. He raised ______ for the charity to help the poor children.
A. thousand of dollars
B. thousand of dollar
C. thousands of dollars
D. thousands of dollar