Playing with matches isn’t safe. =》It is......

                GIÚP MÌNH VỚI CẦN GẤP Ạ
Câu 1: Playing with matches isn’t safe.=》It is.......
Câu 2: Peter is too young to ride his bike to school. =》Peter isn't ..........
Câu 3: He often went to work by plane when he lived in England =》He used..........