Choose the best answer to complete the sentence.

We should _______ pollutants that seriously damage our health or the environment.

Mark the letter A, B, C, or D on your answer sheet to indicate the word that has the underlined part pronounced differently from the others.

Mark the letter A, B, C, or D on your answer sheet to indicate the word that has the underlined part pronounced differently from the others.

Mark the letter A, B, C, or D on your answer sheet to indicate the word that has the underlined part pronounced differently from the others.

Mark the letter A, B, C, or D on your answer sheet to indicate the word whose primary stress is different from the others.

Choose the word which has a different stress pattern from the others.

Choose the best answer to complete the sentence.

Gases that stop heat from escaping into space are called _______ gases.