[ Grammar ]
While I ___________ (prepare) for the exam, my mother was cooking dinner.
A. prepare
B. prepared
C. was preparing
D. am preparing

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Grammar › ViewThis year’s advertising _____ was very costly and did not produce the expected results.
A. peak
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Does this sentence require a semicolon or a comma: David was afraid of Tiny, the leader of the monkeys ______ because David had heard things.
A. ;
B. ,
C. Neither