"I think you should Sue your daughter," Teacher Fei said, and immediately saw the man freeze with hostility.
“我认为你应该去告你女儿，”范老师说，但看见男人立即冷下脸来充满敌意。
You should not address your teacher with such familiarity.
你不应该这样冒失地称呼老师。
Sometimes it is possible to buy used books, but you should check with your teacher first.
有时候可以购买二手书，但要先和老师确认。
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