—Be quick, _______ we’ll be late for the class. —Ok, I’m coming.
—Whose book is this ? — It must belong .
—How do you spend your weekends?—At weekends I prefer _______ at home to _______ out.
—Who’s that boy reading in the study ? Is it David?—It __________ be David. I saw him go home just now.
—What ______ you? —I’m _______ of being left alone in the house.
— What in Yuyao Ningbo this time yesterday ?—I hear it was raining heavily and soon there was a big flood there.