4. Out of _____ and consideration, I always write a thank-you note when someone sends me a gift.
(A)concentration (B)convenience (C)courtesy (D)courtship
6. People who are _____ cannot be easily stopped from doing what they want to do.
(A)happy-natured (B)strong-willed (C)warm-hearted (D)well-intentioned
8. Most people consider Albert Einstein one of the greatest scientists of the 20
th century _____ his remarkable
achievements in quantum physics.
(A)in exchange for (B)in spite of (C)on behalf of (D)in recognition of
11. A biologist does not merely describe organisms, but tries to learn _____ act as they do.
(A)what causes them to (B)causes them to what (C)what to cause them (D)what cause to them
12. An Olympic marathon is 26 miles and 385 yards, approximately _____ from Marathon to Athens.
(A)the distance is (B)that the distance is (C)is that the distance (D)the distance
16. Frankly speaking, _______ your timely help, I couldn’t have dealt with that problem all by myself.
(A) if it were not for (B) if it had not been for (C) if there were not for (D) if there had not been for
19. Tom was _______that he won the respect of every teacher who had taught him.
(A) a such good student (B) a so good student (C) such good student (D) so good a student
20. Over the past 20 years, basketball _______ more popular than baseball in that country.
(A) had become (B) became (C) has become (D) will have become
24. Unless economic conditions _______ next year, there will be widespread unrest across the world.
(A) will improve (B) improve (C) has improved (D) will have improved