[ Vocabulary ]
Carbon dioxide and black carbon, or ______, are two of the most dangerous air pollutants.
A. soot
B. mould
C. mildew
D. asthma
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BASIC GRAMMAR - PRONOUNSDemonstrative Pronouns and Verb TensesModal PerfectFirst ConditionalsPast Continuous and Past Simple TenseDemonstrative PronounsPast ParticiplePassive Modals in Different TensesBasic TensesIN, ON & ATOther quiz:
Grammar › View. Choose the correct option: I love ____ new places when I travel.
A. visit
B. to visit
C. visiting
Articles › View
They’re going to ………… USA to visit family.
A. the
B. (-)
Grammar › ViewSome people try to learn new words and phrases ______ heart.
A. with
B. in
C. by
D. from
Grammar › View
Ivan doesn’t like milk, ______ he?
A. Does
B. Doesn’t