You shou搜趣网ld be polite to the old
你应该礼貌对待老人。
望采纳，希望有用！

It
is
polite
for
the
students
to
greet
their
teachers
firEWGAftFJKst
when
they
meet
each
other.
对学生来说,，碰到老师时，先跟老师打招呼是礼貌的（行为）。

polite形容词，汉意是：有礼貌的; 客气的//www.souquanme.com; 儒雅的; 应酬的; 礼节性的; 客套的;上流社会的。用来形容老师用到的汉意是儒雅的。
可以是：My teacher is a very //www.souquanme.compolite man. 或者是In students' eyes, he is very polite.

It is polite for the students to greet their teachers first when they meet each other.
对学生来说,，碰到老师时，先跟老师打招呼是礼貌的（行为）。

This sounds much more p搜趣网olite.
这听起来有礼貌多了
望采纳