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- Mr. Wang’s never been to Canada, has he?—. He went there on business last week.
- Mary _____ up yet because she _____ to bed very late last night.
- We only heard about the meeting yesterday, so it ______ yet.
- Mr. and Mrs. Black ______ back _________.
- He has never been to Shanghai, _____? —_______. He has been there twice.
- Miss Jones___________Wuxi for one year, but she ________ the Tai Lake.