关于to do is to do 的一题

0o小猪o0

To speak habitually of the ''truly needy'' is gradually instilling the notion that many of those who are just called ''needy'' actually have adequate resources;such a conclusion is unwarranted.
A To speak habitually of the ''truly needy'' is gradually instilling the notion
B To speak habitually of the ''truly needy'' is instilling the notion gradully
C To speak habitually of the ''truly needy'' is gradually to instill the notion
D Speaking habitually of the ''truly needy'' is to instill the gradual notion
E Speaking habitually of the ''truly needy'' is instilling the gradual notion
为什么答案选C而不是E。doing is doing不对吗

0o小猪o0

多谢！！！！

hhhsu27

doing sth is doing sth是对的。不过原文中的gradually是修饰那个instill的动词的。e选项里变为了 adj修饰n。所以错