老师不满地哼了一声，因为学生们又在课堂上讲话了。

The teacher ___harrumphed in disapproval when the students started talking in class again.

那位老绅士不满地哼了一声，转身离开了吵闹的房间。

The old gentleman ___harrumphed in disapproval and turned away from the noisy room.