题目

The boy didn't run ______ to catch the bus.A. fast enough B. quick enough C. enough fast D. enough quick 答案：【答案】A【解析】A 考查副词enough的用法。句意：这个男孩跑得不够快，赶不上公交车。副词fast快地修饰动词run用；quick是形容词，意为快的。程度副词enough修饰副词fast时，要后置。故选A。 口算．420÷7= 480÷80= 450-90= 450÷50= 120×5= 25×3= 400÷80= 3×80÷6=