题目内容：

my typewriter is broken--down -----all machines,_____well--made ,sometimes need repairing.
A how B whatever C even if D no matter how
,为什么,求详解

优质解答

no matter ..不管..
all machines,no matter how well--made ,sometimes need repairing.
所有的机器,不管多好,有时都需要修理.