TAILIEUCHUNG - Toefl ibt internet based test 2006 - 2007 part 42

Tham khảo tài liệu 'toefl ibt internet based test 2006 - 2007 part 42', ngoại ngữ, toefl - ielts - toeic phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 282 MORE MODEL TESTS 25. Look at the four squares that show where the following sentence could be inserted in the passage. Some historians believe they can be established. Where could the sentence best be added Click on a square to insert the sentence in the passage. 26. Directions An introduction for a short summary of the passage appears below. Complete the summary by selecting the THREE answer choices that mention the most important points in the passage. Some sentences do not belong in the summary because they express ideas that are not included in the passage or they are minor points from the passage. This question is worth 2 points. Certain qualities appear to define a civilization. Answer Choices A Free citizens who work in professions for pay E Bureaucracies for the government and armies Dj A strategic location near rivers or the sea IE Organized religion writing and art E A densely populated group with a class structure EE Libraries to house art and written records Reading 3 Life in Our Solar System Although we can imagine life based on something other than carbon chemistry we know of no examples to tell us how such life might arise and survive. We must limit our discussion to life as we know it and the conditions it requires. The most important requirement is the presence of liquid water not only as part of the chemical reactions of life but also as a medium to transport nutrients and wastes within the organism. The water requirement automatically eliminates many worlds in our solar system. The moon is airless and although some data suggest ice frozen in the soil at its poles it has never had liquid water on its surface. In the vacuum of the lunar surface liquid water would boil away rapidly. Mercury too is airless MODEL TEST SHEADING SECTION 283 and cannot have had liquid water on its surface for long periods of time. Venus has some traces of water vapor in its atmosphere but it is much too hot for liquid water to survive. If there were any lakes or .

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