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TOEFL Directory > TOEFL writing > answers for TOEFL reading unit one passage 4
answers for TOEFL reading unit one passage 4
34. C. from the first sentence of the second paragraph
35.A. remove B and C easily. put A and D back to passage ,we got A
36. C.
37.B. "and pose a major problem in the construction and maintenance of highways and railroads that cross sandy areas of desert"
38. C.
39. A. "Methods to mitigate damage to structures from sand dunes include building windbreaks and funneling sand out of the way" . "mitigate" means "decrease".
40. B. "variability"="vary" + "ability". vary means change
41.D. substance=matter. so D.
42.B. "Parabolic dunes form in areas where sparse vegetation anchors the side arms while the center is blown outward".
43. D."Star dunes form by shifting winds that pile up sand into central points that can rise 1,500 feet and more, with several arms radiating outward, looking much like giant pinwheels".
44. A. "Sand grains march across the desert floor under the influence of strong winds by a process known as saltation".
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