[ Grammar and Vocabulary ]
Water pollution is a result of dumping pollutants such as detergents, pesticides, oil, and other chemicals in rivers, which makes the water unclean.
A. substances
B. stuffs
C. contaminants
D. wastes
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Grammar › ViewI _____ to the USA.
A. ’ve never been
B. am never been
C. was never
D. never
Grammar › View
My brother ______ ______ books yesterday and ______ his right shoulder.
A. carries / too many / hurts
B. carry / too much / hurt
C. carried / too many / hurt
D. carried / enough / hurting