()is to do good all one's life and never do anything bada.whichever is hardb.no matter what is hardc.what is hardd.all what is hard为什么答案是c?别的为什么都不对?请给与解释
问题描述：
()is to do good all one's life and never do anything bad
a.whichever is hard
b.no matter what is hard
c.what is hard
d.all what is hard
为什么答案是c?
别的为什么都不对?
请给与解释
答
what is hard是作为整个句子的主语