I`m glad _____ what you have done.a forb atc tod with

I`m glad _____ what you have done.a forb atc tod with
I`m glad _____ what you have done.
a for
b at
c to
d with

I`m glad _____ what you have done.a forb atc tod with
选D.be glad with sth.
be glad to do 乐于做…；高兴做某事
I shall be glad for you to come.你能来我将很高兴.
I'll be glad to do you a favour.我愿意为你效劳.
I am glad about his new job.我为他的新工作感到高兴.
Glad to that.很高兴听您这么说.

glad at 对…感到高兴
选B
我对你们所做的感到高兴。

glad后接at/about/for/of
for表示为了，因为，be glad for 表示为什么而高兴，例如I‘m glad for you,我为你而高兴
be glad at，对什么感到高兴
be glad to,乐意做某事
通常pleased，happy后面接with,表示对什么感到高兴。
所以此题选择B。