Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

Course numbers are an indication of which courses are to various categories of students at the University. Undergraduate courses with the numbers 100 or 200 are generally introductory courses appropriate for freshmen or sophomores, whereas courses with the numbers 300 or 400 often have prerequisites and are often to juniors and seniors only. Courses with the numbers 800 or above are open only to graduate students. Certain graduate courses, generally those devoted to introductory material, are numbered 400 for undergraduate students who qualify to take them and 600 for graduate students. Courses designed for students seeking a professional degree carry a 500 number for undergraduate students and a 700 number for graduate students. Courses numbered 99 or below are special interest courses that do not carry academic credit. If students elect to take a special interest course, it will not count toward the number of hours needed to complete graduation requirements.

Full-time undergraduate student is expected to take courses that total twelve to eighteen credit hours. A full-time graduate student is expected to take courses that total ten to sixteen credit hours. Student holding assistantships are expected to enroll for proportionately fewer hours. A part-time graduate may register for minimum of three credit hours. An overload, that is, more than the maximum number of hours, may be taken with the approval of an academic advisor. To register for an overload, students must submit the appropriate approval form when registering. Overloads above 24 hours will not be approved under any circumstances.

(From: Practice Exercises for the TOEFL iBT, by Pamela J. Sharpe, Ph.D)

Which classification of students would be eligible to enroll in Mechanical Engineering 850?

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There is _________ water in the well, not enough for everyone in the village.

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The artisans in my village can ________ basket weaving. They earn enough money from it.

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She will have to _________ if she wants to pass the final exam. 

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Her car is more expensive than mine.

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Please turn off _____________ light when you leave _____________ room.

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Most guests __________ the party by the time we came. 

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After the tourists ___________ two hours in the supermarket, they ____________ to a traditional craft village.

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They are not allowed to go out by their parents.

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Smoking cigarettes is harmful __________ your health.

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When he retires at sixty, he’ll get a very good ___________.

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The waiter: What would you like to drink?

Mr. David: “___________.”

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(A) The more paper we (B) save, (C) the less trees we use (D) for making it.

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He came when I __________ the film “Man from the star”. 

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This car is so expensive that my father can’t afford _____________ it.

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Like everyone else, Sue has her _____________ of course but on the whole, she’s quite satisfied with life.