高等继续教育 / 大学英语语法
正确率：100%
题型描述: 单选题
The workers in this factory are paid ＿＿＿＿＿＿.
A.by hour.
B.by the hour
C.by hours
D.by an hour
The workers in this factory are paid ＿＿＿＿＿＿.
A.by hour.
B.by the hour
C.by hours
D.by an hour
参考答案：
佳题速递：