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.

As soon as I _________ smoking, I felt a lot better.

The heavy rain has caused _________ in many parts of our country.

Language is considered a significant (31)_________ of communication in international relations.

By working hard, you _________ achieve the results you desire.

Caring for a sick relative is the task that brings both ______ and pain.

Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.