In such a fierce competition, a person has to make every effort if he ______ .
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.
—Excuse me. Did you notice whether the No.108 bus had gone by? —Not I’ve been standing here.
—How come you are late for class again? — .