[ General Knowledge ]

How many 1 cubic inch marbles are necessary to cover a 30ft x 40ft gymnasium to a depth of 2 ft?

A. 144,000
B. 12,000
C. 80,000
D. 24,000

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Noun ClauseActive vs. Passive VoiceRelative Pronoun

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_________ do you do your homework?
– After school.

A. Where
B. How long
C. When

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