[ Grammar ]
Which sentence does NOT use a colon correctly?
A. Most earthquakes are not violent or scary: They are too small to be felt.
B. Pumice is a kind of volcanic rock because it is: the only rock that can float in water.
C. The earth isn’t perfectly round: the north and south poles are slightly flattened.

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Grammar › ViewShh! They _____ _______at the moment.
A. was studied
B. were studying
C. are studying
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They have had ________homework in mathematics recently.
A. a lot
B. much
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