The _____ stuck on the outside of the envelope said "By Air".
—What is the man, do you know? —I don’t know exactly. But I think he can be but a teacher.
sometimes keeps her awake at night Tom is getting more and more quiet at home.
Mrs. Black took the police back to place she witnessed the robbery.
—The English exam is not difficult, is it? — . Even Tom to the top students failed in it.
Ask American which city has the worst air pollution, and the answer is sure to be Los Angeles.