While the computer becomes more and more powerful, I don’t think it will completely ___________ teachers in class.
He has little acquaintance _______ music , while he has a wide knowledge ____ painting.
He insisted what he did _______ right and that anyone who broke laws ________.
It’s uncertain _______ side effect the medicine will bring about , although about two thousand patients have taken it .
--Sorry, I have to _________ now. It is time for class. --- OK, I’ll call back later.
Written in a hurry , _____________. Which one of the following is right ?