–Look! A man is cutting a tree on the moon. --It ______ be true. The teacher said there is no air on the moon.
It’s selfish ________ him ________ the cakes with others.
This is _______ song I have introduced you many times. Isn’t it _______wonderful one?
We never doubt _______ Bill is honest. Because he never tell lies.
Usually, it’s easier to make______ decision than to take _______ action.
—Which do you prefer, a CD player or a walkman? —_______. I prefer a portable computer.