--How do you pay the waitress?-As a rule, they are paid .A. by hourB. by the hourC. by

发布时间：2020-08-17 12:23:13

--How do you pay the waitress?  ---As a rule, they are paid     .
A. by hour
B. by the hour
C. by an hour
D. by hours

网友回答

A. by hour
(答案→)B. by the hour
C. by an hour
D. by hours
解析：表示“单位”的名词，前面要加定冠词。
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