You must be mistaken about seeing Tim in the supermarket.I'm sure he —— abroad all week.A.will be B.was C.has been D.had been

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YoumustbemistakenaboutseeingTiminthesupermarket.I''msurehe——abroadallweek.A.willbeB.wasC.hasbeenD.had

You must be mistaken about seeing Tim in the supermarket.I'm sure he —— abroad all week.A.will be B.was C.has been D.had been
You must be mistaken about seeing Tim in the supermarket.I'm sure he —— abroad all week.
A.will be B.was C.has been D.had been

You must be mistaken about seeing Tim in the supermarket.I'm sure he —— abroad all week.A.will be B.was C.has been D.had been
B 仅表示当时在国外的状态,不存在完成时的意味,只需用过去时