After the teacher came in,the class _____.

问题描述:

After the teacher came in,the class _____.
A.got down to workB.got down working
C.went down to work D.went down workong

A.got down to work
D.went down workong干扰很大,它可理解为继续干原来一直在干的事(go on doing )
但这样的话与题意不符,应该是”老师走进来后同学们才开始干什么.因为get down to 接名词或者动名词,而work的名词正好写出来还是work ,"开始做...事情".所以选A