well-behaved

well-behaved  ウｴﾙ-ﾋﾞヘｲｳﾞﾄｩ  adj)行儀のよい

Monkeys are not known for being well-behaved, but they can be silly, cheeky and a lot of fun to watch.

silly シｨﾘｰｨ  adj)愚かな･馬鹿な･ふざけた

cheeky チｨ-ｷｰ　adj)ずうずうしい･生意気な

Do you think that Japanese students are, on the whole, well-behaved?

on the whole 概して