锻件上的飞边可以用（）去掉。
A.扁凿
B.窄凿
C.油槽凿
D.圆凿
参考答案：A
The athlete fell off his bike when he _____ down the hill. [ ]
A. cycled
B. was cycling
C. had cycled
D. is cycling
A城市每立方米自来水的水费是B城市的1.25倍，同样交水费20元，在B城市比在A城市可多用2立方米自来水，求A城市每立方米自来水的水费是多少元？
