1·You must keep silent during the exam.
考试时你必须保持沉默。
2·Would you please keep silent? The weather report is being broadcast and I want to listen.
你可以保持安静吗？正在播天气预报，我想听一下。
3·Hoping to discover what language a child would speak if he heard no mother tongue, he told the nurses to keep silent.
他希望发现一个没有听到母语的孩子会说什么语言，他让护士们保持沉默。
4·Yes, I just wanted to keep silent.
是的，我要保持沉默。
5·He warned her to keep silent.
他告诉她要保持沉默。
6·Do you know when to keep silent?
你知道什么时候该保持沉默吗？
7·He can keep silent 10 hours.
你能保持沉默长达10个小时。
8·You are wise to keep silent.
你保持沉默，这是明智。
9·I could not keep silent.
我不能保持沉默。
10·Please keep silent. I want to study.
请保持安静！我想要学习。