--- Robert is indeed a wise man.---Oh, yes. How often I have regretted_______his advice!
Seeing the policeman, the thief was behaving __________ nothing had happened.
Tom, you ________ leave all your clothes on the floor like this next time.
Although they are twin sisters, they have nothing__________.
He is wearing sunglasses to ____ his eyes from the strong sunlight .
I have bought two ball pens, _____ writes well.