I often go swimming with my father______Sunday.
—Look! That man looks like Mr.Brown.—It ________ be him, for I know he is at home.
—Tom has never visited the Great Hall of the People, _____?—He went there last month.
CCTV news reported Chairman Xi Jinping visited Russia _________ the afternoon ______ March22nd, 2013.
This TV play is very interesting.Why _________ down and watch it?
—May I speak to the headmaster?—He’s not here.He _______ Beijing.Can I take a message?