— Do you often brush (刷) your _____? — Y_爱下问搜题

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问题选择题

— Do you often brush (刷) your _____?
— Yes, I do.

A. tooths
B. teeths
C. teeth
D. tooth

答案

答案：C

选择题

— When do you go shopping?

— I usually go shopping ____ Sunday mornings. [ ]

A. on

B. in

C. at

D. for

问答题简答题

液压系统出现振动和噪音的可能原因有哪些？