IV. Mark the letter A, B, C or D on your answer sheet to indicate the word(s) CLOSEST in the meaning to the underlined word(s) in each of the following questions.
27. Environmental influences can affect the expression of genes.
A. destructions B. impacts C. protections D. behaviors
28. Air pollution in the form of carbon dioxide and methane raises the earth’s temperature.
A. deforestation B. environment C. contamination D. effect
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27:C
28.A