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excuse me... I try to practice my TOEFL by doing some exercises and I get these confusing questions. I hope you can help me correct my answer... 1. Recycling is a means of reducing the demand on nonrenewable resources ____ of preventing some problems of pollution and waste disposal. (A) either (B) and © too (D) both my answer is D, but I'm not sure 2. Although gorillas have no natural enemies, male leaders typically attack all intruders, thereby allow females and the young to flee to safety my answer is allow, maybe it should be they allow ? 3. Candles and oil-burning lamps remained the chief sources of artificial illumination when the middle of the nineteenth century, when kerosene lamps came into common use my answer is when, maybe it should be during ? 4. Cosmogony is a term applied to the study of the origin and development of the universe as well as to the theories concerned its origin my answer is concerned, maybe it should be concerning ? 5. Flint was a favored material of prehistoric humans, which used it to make tools and weapons, because it would chip into shapes with sharp edges my answer is which, maybe it should be who? 6. The flamingo constructs a cylindrical mud nest for its egg, which both parents care for it :wallbash:my answer is the, maybe it should be omitted ? 7. Many sedimentary rocks were deposited in the ocean contain the fossils that record much of Earth's history. my answer is record, maybe it should be recorded ? 8. The far northern wilderness of Quebec has vast deposits of iron ore, ____ province's leading mineral products. (A) where the (B) are the © which the (D) one of the my answer is D and I'm not sure about it 9. Sunspots are but one manifestation of solar activity related of the Sun's magnetic field .:wallbash:my answer is but, maybe it should be ......... i don't know 10. In the United States, the attorney general is a cabinet member in charge with the administration of the Department of Justice my answer is administration, maybe it should be administrator ? 11. Vitamins A and C and most of the B vitamins are retain in foods that have been canned. :wallbash:my answer is retain, maybe it should be retained ? 12. Velocity may be uniform, in which case both speed and direction remain constant, variable, in which case speed, direction, or both changes :wallbash:my answer is changes , maybe it should be change ? 13. Canada began cultivation wheat intensively in 1910, which led to a demand for tools, machines, housing, and building supplies. :wallbash:my answer is cultivation, maybe it should be cultivating ? or maybe housing is the answer ? 14. A telescope consists of a series of lenses and, often, mirrors capability of producing a magnified image and of collecting more light than the unaided eye . :wallbash:my answer is the, maybe it should be omitted ? I am sorry if I make any mistake by asking too many questions. thanks in advance.. May God always bless you guys...

GRE Problem. How to solve this inequality? a If a is an integer that satisfies the inequalities shown, what is the value of a ? a=_____ Answer is 7.

Hello, everyone! So I came across this rather difficult practice combinations question on magoosh.com, and while the answer was given, the explanation for it was not. Here is the question (and the answer hidden by a spoiler tag): An artist is planning on mixing together any number of different colors from her palette. A mixture results as long as the artist combines at least two colors. If the number of possible mixtures is less than 500, what is the greatest number of colors the artist could have in her palette? (A) 8 (B) 9 © 11 (D) 12 (E) 13 Would anyone happen to know exactly how to approach this question?

Recently in the automobile industry, multinational companies have developed to the point where such few cars can be described as having been made entirely in one country. anyone knows, why the incorrect answer in this kind of question is "such few' I would really appreciate it

Hi, are advanced calculators that can do calculus, linear algebra, diff eq, allowed during graduate Econ exams and for homeworks? What is the general answer? I’m checking with my school but it seems kind of vague...

In Q13 in the picture, the answer given is (BF) whereas I thought it should be (BD). My reasoning was that the films do not physically inhabit any space at all, they merely emulate settings. On seeing the answer I realized that the 'they' in option D refers to the films but the 'they' in F refers to the characters. Either way, I think both options should work equally well. Is this not the case? I did search for the question but did not find any previous threads about it. The solutions in Barron's aren't that helpful. [ATTACH=CONFIG]7238[/ATTACH]

I have noticed that ETS does not keep consistent how it treats results of square roots. For example: Q: If (X+3)^2 = 225, which of the following could be the value of x-1? A: correct answer is -19 and the assumption is square root of 225 is both 15 and -15 Q2: Which is bigger between the two? squareroot(7) + squareroot(11) OR squareroot(3) + squareroot(15) A2: I thought the answer would be D as in the relationship cannot be figured out since any of the square roots can be a negative number and we do not know which is which Any thoughts on when to explore a negative answer to a square root problem v. when to not?

There are five employees willing to serve on one of two different committees. If each employee can only serve on one the committee, how many possible ways are there for the openings on the committees to be filled? I don't get this question. In my own view, each employee should have 2 option between the 2 committees. Therefore the answer would 2 to the power of 5 and 32 but the answer is 20 and I don't know WHY?? or could be the wrong answer? help, please.

For all numbers x and y, the operation фis defined by x ф y = (x+y)*(x-y) + (y-x)*(y+x) +x*y. What is the value of (sqrt12)ф(sqrt3)? A 6 why is the answer 6?

What might the possible solution of this problem