it rained so ------(hard) that they had to drive very slowly .单词的适当形式填空

问题描述:

it rained so ------(hard) that they had to drive very slowly .单词的适当形式填空

雨下得如此大,以至于他们不得不开得很慢.这里需要用hard对应的副词来修饰动词rained,来表示雨下得大的程度.so...that...表示如此...以至于...,其中that引导结果状语从句.hard表示大或者努力时的程度副词就是hard本身...