Bob would have helped us yesterday, but he-_______ A.was busy B.is busy C.had been busy.
Bobwouldhavehelpedusyesterday,buthe-_______A.wasbusyB.isbusyC.hadbeenbusy.D.willbebus...
Bob would have helped us yesterday, but he-_______ A.was busy B.is busy C.had been busy. D.will be busy
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