老师把学生们放学后留校作为吵闹的惩罚。

The teacher ___kept the students ___in after school as a punishment for being noisy.

我父母让我整个周末都待在家里，因为我没完成作业。

My parents ___kept me ___in all weekend because I didn't finish my homework.

医生决定让她住院进一步观察。

The doctor decided to ___keep her ___in for further observation.