—Thank you very much.—___________.
Do you think Maths ______ useful subject?
---______ Mary happy today?---I don’t think so. She ______ look happy this morning.
______ is the first day of a week.
---Who’s that man ______a white shirt? ---He is Mr. Wu.
---_______your mother good at cooking?---Yes, but my father _____ cook well.