As a rule, domestic servants doing odd jobs are paid . A. by the hourB. by hourC. by an ho

As a rule, domestic servants doing odd jobs are paid .
A. by the hour
B. by hour
C. by an hour
D. by hours

(答案→)A. by the hourB. by hourC. by an hourD. by hours解析：by与the连用,可用于表示“以……为标准或单位”。又如：by the week, by the year, by the thousand等。注意：按重量计应表达为by weight。

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