My English teacher is Mary Smith and we call her ______.
—Allen, please tell me what you are going to be when you grow up.—To be______ engineer just like you.
—Did you know ______ just now?—Their plane didn't take off on time because of the thick fog.
Do you know where Jimmy is? I ______ him for such a long time.
—How did the writer win the prize?—He worked day and night for two years. ______ . he succeeded.
—Which of the two new books do you like better?—I like ______ of them, because they're not useful to me.