1.safety (反义词) 2.safe(反义词) 3.quick (副词) 4.fireman (复数) 5.slowly (反义词)

1.safety (反义词)dangerous 2.safe(反义词) danger 3.quick (副词) quickly 4.fireman (复数) firemen 5.slowly (反义词)quickly 6.build (过去式) built 7.leave (过去式) left 8.hear (过去式) heard...ssslowly (反义词)还可以是fast