——John always thinks of others instead of himself.—— So he does. It is _______ of him to want to help others.

Wait till you are more ________. It’s better to be sure than sorry.

Mr. Wang, a(n)_______editor and writer, is going to attend the conference to be held in Beijing next week.

I’m sure that your letter will get _____attention. They know you’re waiting for the reply. 

—Did you listen to Mr.Jackson’s lecture ?— Yes，I have never heard a _____ one.