Ourteacheroftentellsus time.A．notwaste B．don'tw...

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Our teacher often tells us time.

A．not waste B．don't waste

C．not to waste D．doesn't waste

【解析】句意: 我们老师经常告诉我们不要浪费时间。waste动词，浪费。tell sb. (not) to do sth.告诉某人（不）做某事，动词不定式在句中作宾补。not to do是动词不定式的否定形式。故选：C。