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
