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题目内容
（西安石油大学大学英语（2）作业题）
(单选题) What is the expression of “mind their p’s and q’s” supposed to mean? ( )(本题2.5分)
A、 To mind their own business.
B、 To remember to say “please”.
C、 To remember to say “thank you”.
D、 To be well-mannered.
A、 To mind their own business.
B、 To remember to say “please”.
C、 To remember to say “thank you”.
D、 To be well-mannered.
参考答案
