—Mary, could you tell me if your mother ________ our school sports meeting tomorrow?　　—I think she will come to school if she _________ free.　　

—She’s already back to Nantong, ______? —______. She is on a visit to Tokyo. 

—Mr Wang’s never been to Canada, has he?— ______. He went there on business last week.

— You didn’t sleep well last night, did you?  —      , so I feel tired now. 

—_________ do you come to school on weekdays? — By bike.