根据句意及汉语提示填空。
【小题1】These plants float on the _______ (表面) of the water.
【小题2】My grandparents keep a lot of _______ (绵羊) in the countryside.
【小题3】The fox usually _______ (以……为食) meat.
【小题4】The teacher had no _______ (控制) over the children.
【小题5】The rivers in the countryside are much _______ (清澈) than those in the cities.