选C.
--She shouldn't have done that sort of thing.
--她不该做出那种事.
-- Whatever she did was reasonable,_compared___ to what you did.Besides,it's none of your business.Get down to _doing__ your lessons.
--和你做的事情比起来,她做的任何事情都是有理由的.除此之外,这也不关你的事.去做功课吧.
A.compairng;doing B.comparing; do
C.compared; doing D.Compared;do
分析：
不选comparing是因为句子主语是what she did她做的事情.和你比.主语是事情,所以用被动语态.compared.
第二个选项是考词组的.get down to sth/doing sth.
表示“着手干某事”,后面只能跟名词或动名词形式.