第一道；--she shouldn`t have done that sort thing.

第一道；--she shouldn`t have done that sort thing.
--whatever she did was reasonable ,_____to what you had done.
--Besides,it`s none of your business.Get down to _______your work.
A.comparing ； doing B.comparing ； do
C.compared ； doing D.compared ； do
第二道； This is a very interesting book.I`ll buy it ,______.
A.how much may it cost B.no matter how it may cost
C.however much it may cost D.how may it cost.
第一道题选C 第二道题选C .第二道题我选B 为什么选C呢?

comparing 现在分词短语表主动,说明compare这个动作是它的逻辑主语发出的．
compared 过去分词短语表被动,说明逻辑主语是compare这个动作的承受者．
what she did 是要被比较的.所以用ed.
再举个例子：Comparing with the blue skirt,i prefer the yellow one.懂了吧.
第二个选b
题目想要表达不管多贵都买.所以a排除.nomatter how等于however.所以选c的话应该把much去掉.d翻译不通.