It’s necessary to be prepared for a job interview. ___ the a

It’s necessary to be prepared for a job interview. ___ the answers ready will be of great help.
A. Having had B. Having 为什么不选A呢?
我想知道动名词的完成式 having done能不能做主语？？？？？？有的有可以 有的说不可以？来个专业点的哦
说可以用动名词完成时做主语的看2. .
2.Herry doesn';t seem like the same person.
______so much in the war has made him more thoughful
A.for him to see
B.His seeing
C.Having seen
D.to have seen那这个怎么算？？
这题是我们练习册上的，不是我出的哦

句子主语需要动名词,分词having had一般用作状语
我想知道动名词的完成式 having done能不能做主语?有的有可以 有的说不可以?来个专业点的哦
可以
having killed bill made Tom a murderer.
但是这个动作表示已经做了,你这题不是这样.
说可以用动名词完成时做主语的看2..
2.Herry doesn';t seem like the same person.
______so much in the war has made him more thoughful
A.for him to see
B.His seeing
C.Having seen
D.to have seen那这个怎么算?
B.His seeing
C.Having seen
这两个答案都是对的,你不是想玩我吧 故意出这种题?
我相信你更相信练习册答案,而不相信我...