I'm sorry .That wasn't of much help._.And it was most helpful.

I'm sorry .That wasn't of much help._.And it was most helpful.
I'm sorry .That wasn't of much help._.And it was most helpful.

I'm sorry .That wasn't of much help._.And it was most helpful.
-I’m sorry.That wasn’t of much help.-_.And it was most D 考查日常用语.后句中的As a matter of fact,it was most helpful,

对不起，，虽然不能给你多大的帮助，，但 那是最好的帮助，，

对不起，没有多大帮助。_。它是最有帮助的。