题目内容：

一道语法英语题
as a student,each of us shoud study -----possible
a,harder than b,so hard as
c,as hardly as d,as hard as
讲解清楚

优质解答

D
as …… as possible固定搭配,意思是尽可能……
hard可以当副词,hardly意思是几乎不……