--- Is Lucy knocking at the door?--- No. It ______ be Lucy. She is in America now.
—How many teachers are there in your school? — them over two hundred.
—Where did you go last week? —I went to Zhang Aiping’s hometown and visited the house he was born in.
—Tom didn’t go to school this morning, did he? — .Though he had a bad cold.
— Could you please tell me ? —Tomorrow morning.
—What useful book it is! —Yeah, it tells you how to play guitar.