Most doctors and nurses have to work on a _______ once or twice a week at the hospital.

What is the topic of the passage ?

By the time he retires, he _______ in this company for thirty years.

Air pollution occurs when wastes dirty the air. People produce most of the (33) _______ that cause air pollution. 

We took _____ taxi to _____ airport.

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.

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 question.

Who’s the girl standing _________ Alice and Mary?