----- Is that Mr.Smith over there? ----- No, it _____ be him --- I am sure he is much taller.
I don't skate now, but I___________ when I was a kid.
We liked the oil painting better____________ we looked at it.
We must keep our room clean. Dirt and disease go ____________, you know.
--Could I use your bike, Jack? --Of course, you____________.
Helen is much more kind to her youngest child than to the others,___________ of course, make the others unhappy.