别忘了明天上午前把报告交给老师。

Don't forget to ___turn in your report to the teacher by tomorrow morning.

我明天要早起，所以今晚得早点睡觉。

I have to wake up early tomorrow, so I'll ___turn in by 10 tonight.

他因为害怕报复，不敢向警方告发他的同伙。

Afraid of retaliation, he didn't dare to ___turn in his partners to the police.