[ Word Form & Verb Tense ]
People can develop health problems and become ill if they breathe _____ air
A. pollution
B. to pollute
C. polluting
D. polluted
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Grammar & Vocabulary › ViewWhich sentence is wrong?
A. I visited the Louvre museum.
B. I visited my best friend.
C. I visited a very popular city.
D. I visited a walk.
Grammar › View
She promised_________me a new guitar.
A. buying
B. to buying
C. buy
D. to buy