[ Subject Verb Agreement ]
Sixty or seventy freights ________ on the transcontinental line each year.
A. uses
B. travel
C. travels
D. be

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Grammar › ViewThe pig _____________ around in the mud.
A. roll
B. rolls
C. rolling
Tenses › View
Were Ulla and her friends playing Monopoly while we _____ Draughts?
A. played
B. were playing
C. have been playing
D. had been playing