foot ·phrase (IDIOM)
Definition: to tell someone in a strong way that they must do something or must stop doing something Level: C2
当她的孩子们拒绝做作业时，她不得不坚决制止。
When her children refused to do their homework, she had to ___put ___her ___foot ___down.
如果噪音持续，你应该坚决制止并向当局投诉。
If the noise continues, you should ___put ___your ___foot ___down and complain to the authorities.
当学生试图在课堂上使用手机时，老师坚决制止了。
The teacher ___put ___his ___foot ___down when students tried to use phones in class.