---What did you do last Friday? ---Sam played ________ chess and I played ________ piano.
I’m not sure whether I can hold a party in the open air, because it _____the weather.
I feel ___ hot because I’ve drunk _____beer.
When H7N9 bird flu first appeared,people didn’t know _____ doctors could cure it.
------Do you mind me sit here? ------_________,it’s for Mr Brown.
I was born ___ the evening ___ March 12,1997.