Clearly there is much to be desired _____ it comes to the quality of teachers and their teaching methods.

Life is more than merely trying to achieve thestandards of society but trying to be a good person ______ one’s own standards

Why did he say so?— Sorry, I don’t understandhe has said means.

I don’t like physics ______ it’s too difficult for me.

Why, my new computer is rubbish! Five hours has passed and it still hasn’t finished the downloading. —Don’t worry. You know, sometimes the Internet ________ be very slow.