Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions

Air pollution, together with littering, are causing many problems in our large, industrial cities today

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions

________, he began to make friends more easily

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We thanked the hosts for their generous ________ and got under way.

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Of the two landscapes that you have shown me, this one is ________.

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Laboratory tests carried ________ by three independent teams of experts have given similar results

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions

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It was an act of considerable bravery, way beyond the call of duty, and we will forever be in his ________. 

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When his boss dismissed him from his jab, he ________ there for 10 years.