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

What is the topic of the passage ?

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

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

We took _____ taxi to _____ airport.

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.

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.

A thief broke into Harry’s flat and _____ his TV.