— Do you know _______?— He is a dentist.A. where he is fromB. what does he doC. what his father is
—Sir,could you please put out your cigarette?This is a smoke-free(无烟的)school.—________.
Few people think about what they can do________others.
—What are they doing now?—They are busy________articles in the room.
They decided________the homeless kids.
There are many trees on________side of the road.