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This is the reason _______ he was absent.A.thatB.whichC.whyD.what
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A booking-office is a place _______ tickets are sold.A.whenB.whereC.whyD.which
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This is the museum _____ we visited last year.A.whereB.thatC.whatD.who
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This is the person __________ I borrowed some money.A.whoB.from whomC.from whoD.