---There is somebody knocking at the door. Who________ it be?---I’m not sure. It ________ be a postman.
Let’s some salad.
Jack have salad dinner?
Her mother watch TV every day.
I have a green sweater, I don’t like it.
—In the old days, most teenagers had to work for the landlord (地主) in the field to help _____ their families, because their families couldn’t _____ education for them.—What a pity!