[ 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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Grammar › ViewMany people _______ (serve) you.
A. will serve
B. will serves
C. will are serving
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They (study) for their exams at the moment.
A. have studied
B. will study
C. were studying
D. are studying
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