[ Grammar ]
The government has tried to limit the number of private cars _____ the problem of air pollution remains unresolved.
A. when
B. but
C. so
D. if

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Adjective › ViewWe saw …fireworks in the sky.
a.exploded
b.exploding
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They have answered ________ to all his questions.
A. brave
B. bravely
TOEFL Adjective and Adverb › ViewOn July 4, 1776, the American colonies declared . . . independence from Britain.
A. it was
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C. with them
D. their
Mixed General Quiz › View
Macbeth is Shakespeare’s most violent play, so it is not ideal family entertainment.
A. compound
B. complex
