I don't __________ computer books, since they tend to go out of date really quickly.
He _____ be really difficult at times even though he ,generally speaking, is a nice person.
John received an invitation to dinner, and with his work ________, he gladly accepted it.
You can only be sure of_________ you have at present; you cannot be sure of something _____ you might get in the future.
—Could you turn the TV down a little bit? —________. Is it disturbing you?
—Guess what! I have got A for my term paper. —Great! You ______ read widely and put a lot of work into it.