What is worth is worthy well.A.to do; to do B.to do ;of being doneC.doing;to do D.doing;of being done

What is worth is worthy well.A.to do; to do B.to do ;of being doneC.doing;to do D.doing;of being done
What is worth is worthy well.
A.to do; to do B.to do ;of being done
C.doing;to do D.doing;of being done

What is worth is worthy well.A.to do; to do B.to do ;of being doneC.doing;to do D.doing;of being done
be worth 动词ing /名词
be worthy of 动词ing/名词
第一个可以表示被动.而第二不能.要表示被动,加being done
如：
this book is worth reading.
this book is worthy of being read.
所以你的问题选d
What is worth doing is worthy of being done well.
语法的问题,不存在理由
你可以搜索一下worth和worthy这两个词,用法是很明确的,百度辞典里也有

D