问题补充:
Your sister works very hard ,and .
A. so you are
B. so you do
C. so are you
D. so do you
答案:
A. so you are
B. so you do
C. so are you
(答案→)D. so do you
解析:so引导的倒装句,其结构为so+助动词+主语(主语与上文的主语是同一人),表示某人的确是这样的,或so +主语(主语与上文的主语不是同一人)+助动词,表示另外一个人也是这样。故选D