[ 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

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Direct and Indirect Question › ViewAre the teachers in the meeting?
A. Do you know if the teachers are in a meeting?
B. Do you know if the teachers in the meeting?
C. Do you know if the teachers in a meeting are?
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Isn’t it strange that you ____ for Mark’s surprise party all week, but you ____ him a birthday present yet?
A. are preparing / didn’t buy
B. prepared / don’t buy
C. have prepared / aren’t buying
D. have been preparing / haven’t bought