[ Vocabulary ]
chemical pollution in the air mixed with falling water
A. emissions
B. smog
C. acid rain
D. sewage
Select your answer:
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Possessive Adjectives VS Possessive Pronouns › ViewMy dog is playing with______bone.
A. its
B. our
C. their
D. her
Grammar › View
She is the best student in class. She ________ smart
A. must be
B. might be