[ Subject Verb Agreement ]
The more-or-less rhythmic succession of economic booms and busts (is / are) referred to as the business cycle.
A. is
B. are
Select your answer:

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Exercise helps keep you fit and healthy.
A. Past Continuous Tense
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They___________ the library when I ________ there.
A. were closing / got
B. closed/ got
C. closed/ had got
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