A. SIGHT B. LIES C. SITES D. SEATSĐỌC KỸ ĐOẠN VĂN SAU VÀ CHỌN PHƯ...

Câu 35: A. sight B. lies C. sites D. seatsĐọc kỹ đoạn văn sau và chọn phương án đúng (ứng với A, hoặc B, C, D) cho mỗi câu từ 36 đến 44.The ocean bottom - a region nearly 2.5 times greater than the total land area of the Earth - is avast frontier that even today is largely unexplored and uncharted. Until about a century ago, thedeep-ocean floor was completely inaccessible, hidden beneath waters averaging over 3,600 metersdeep. Totally without light and subjected to intense pressures hundreds of times greater than at the5Earth's surface, the deep-ocean bottom is a hostile environment to humans, in some ways asforbidding and remote as the void of outer space. Although researchers have taken samples of deep-ocean rocks and sediments for over acentury, the first detailed global investigation of the ocean bottom did not actually start until 1968,with the beginning of the National Science Foundation's Deep Sea Drilling Project (DSDP).Usingtechniques first developed for the offshore oil and gas industry, the DSDP's drill ship, the Glomar10Challenger, was able to maintain a steady position on the ocean's surface and drill in very deepwaters, extracting samples of sediments and rock from the ocean floor. The Glomar Challenger completed 96 voyages in a 15-year research program that ended inNovember 1983. During this time, the vessel logged 600,000 kilometers and took almost 20,000core samples of seabed sediments and rocks at 624 drilling sites around the world. The Glomar15Challenger's core samples have allowed geologists to reconstruct what the planet looked likehundred of millions of years ago and to calculate what it will probably look like millions of yearsin the future. Today, largely on the strength of evidence gathered during the Glomar Challenger'svoyages, nearly all earth scientists agree on the theories of plate tectonics and continental drift thatexplain many of the geological processes that shape the Earth. 20 The cores of sediment drilled by the Glomar Challenger have also yielded information criticalto understanding the world's past climates. Deep-ocean sediments provide a climatic recordstretching back hundreds of millions of years, because they are largely isolated from themechanical erosion and the intense chemical and biological activity that rapidly destroy muchland-based evidence of past climates. This record has already provided insights into the patterns25and causes of past climatic change - information that may be used to predict future climates.