___________is hard is to do good all one's life and never do anyt_英语解答

___________is hard is to do good all one's life and never do anything bad A he B it C that D what
为什么不选B 而选D？

人气：243 ℃　时间：2020-04-04 10:35:32

解答

选D
A,C一看就是错的.
选B的话应该是It is hard to do good……多了个is
D是对的.what is hard 是主语