货币首先是商品，它与其他商品一样，是人类劳动的产物，是价值和( )的统一体。
A．价格
B．质量
C．劳务
D．使用价值
参考答案：D
The most important thing about cotton in history is ______part that it played in ______ Industrial Revolution.
A．不填；不填
B．the; 不填
C．the; the
D．a; the
Not until I dropped off from school ____ how much time I had wasted.
A．didn't I realize
B．I realized
C．I didn't realize
D．did I realize
