It's raining _____ outside ,为什么用 hard 而不用 heavy

It's raining _____ outside ,为什么用 hard 而不用 heavy It's raining ___ outside.A.hard B.hardly C.heavily D.heavy 选 It's raining为什么不用rainy 为什么用raining 而It's cold又用cold? it is raining as heavily as yesterday 为什么用heavy而不用heavily,两者 It's raining _____ outside.填什么? It's raining hard outside .you'd better _____ now A not go B It's raining heavily.为什么用heavily 而不是heavy? It’s raining hard outside.You’d better __________.--- OK. It is raining _____ outside. it's raining h____ outside 请教it's raining outside How_____ it's raining outside!