______ is not clear to researchers.

I’m sorry, teacher. I’ve _______ my homework on the bus.

____ no two people think exactly alike, there will always be disagreement, but disagreement should not always be avoided; it can be healthy if handled creatively.

She _______ for hours. That’s why her eyes are red now.

Stars shine because of _______ produced by the nuclear reactions taking place within them.

In ______ people, the areas of the brain that control speech are located in the left hemisphere.

Drinking water ________ excessive amounts of fluorides may leave a stained or mottled effect on the enamel of teeth.

Workers who do not obey the safety regulations will be _______ immediately.

My sister supports her living by _______ of evening jobs.

The area was _______ by that storm, wasn’t it?

An architect planning a new house should always _____ in mind his client’s needs.

He always did well at school _____ having his early education disrupted by illness.

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

He drove fast and arrived an hour _______ of schedule.

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