--- Marry is in hospital. --- Oh, really? I _______ know. I _________ go and see her.
----Hey, you haven’t been acting like yourself. Everything OK? ----________ .
The two animals come from the same family but differ __ body shape and breeding habits.
Please don’t ask me to solve mathematical problems; they are beyond my ____.
George always does his best, and that’s ______ I like about him.
The staff are excited that they have succeeded in what they ____ to do three months ago.