题目内容：

As a student,it is ______ to come late to class.
A.good manners
B.bad manners
C.a good manner
D.a bad manner

优质解答

首先,迟到应该是一个坏习惯,就只能是a bad manner或 bad manners .而manner作为习惯行为讲时多为复数,如 It is good manners to be polite.