[ 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 › ViewChoose the correct word(s):
Motor racing, especially Formula 1, is _________________ sport to take part in.
_____
A. more expensive
B. most expensive
C. the more expensive
D. the most expensive
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The football season ______ a month ago.
A. began
B. was beginning
C. were beginning
D. begun
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A. ’ve never been
B. am never been
C. was never
D. never
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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
