[ Vocabulary ]
Carbon dioxide and black carbon, or ______, are two of the most dangerous air pollutants.
A. soot
B. mould
C. mildew
D. asthma
Select your answer:
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Tenses - Pasive VoiceModals for DeductionPreposition of TimePresent/Past/Future Continuous TenseGrammar for TOEFLQuantifiers and AdjectivesAdjectives vs AdverbsGrammar ModalsTransitive and Intransitive VerbSimple Compound and Complex SentencesOther quiz:
Comparisons › View“The inflation rate in Greece is five times________my country,” he said.
A. as much as
B. more than
C. as high as that in
D. as many as that in
Grammar › View
They are ________ to hold a farewell party today.
A. go
B. goes
C. went
D. going