—I ________know you were here. When did you arrive?—At eight o'clock.
不明飞行物的英语缩略形式是_________.
--Are _______ your quilts, Mary? --No, ______ aren’t.
I ______ a girl. Lucy and Lily _______ my cousins.
--Is _______ your photo? --Yes, it _______.
-- What' s Mr. White' s ________, Jim? --It' s Tom.