It's good_____to stand up when you answer teacher's questions in class.A.manner B.manners C.luck D.idea请写出原因

It's good_____to stand up when you answer teacher's questions in class.A.manner B.manners C.luck D.idea请写出原因
It's good_____to stand up when you answer teacher's questions in class.
A.manner B.manners C.luck D.idea
请写出原因

It's good_____to stand up when you answer teacher's questions in class.A.manner B.manners C.luck D.idea请写出原因
B! 这个肯定对的,不解释,错了我是你孙子

A

选B，这是个固定搭配

a

A 原因是It's good manner...是一个句型
另外B it和manners单复数矛盾
C D字面意思不通