Tham khảo tài liệu 'the complete guide to the toefl ibt reading part 11', ngoại ngữ, toefl - ielts - toeic phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Lesson 8 Completing Summaries and Charts 151 ideas of paragraphs 5 6 and 7 are combined in choice C. The main idea of paragraph 8 is given in choice E although the word invasion does not appear in this choice. Choice A mentions accidentals as an example of an organism whose appearance represents the sweepstakes route. It is mentioned only as a detail not as the main idea of the paragraph. Choice D is about the topic of barriers but it presents information that is not given in the passage. There is nothing in the passage to suggest that behavioral barriers are not as effective as physical barriers. Choice E is mentioned in the passage but it is given as a detail in the discussion of physical barriers. It is not a main idea. Your best choices then are choices B C and E. Reading Biological barriers can be the result of physical features climate competition and behavior. Organisms can cross barriers by means of three natural types of pathways corridors filter routes and sweepstakes routes. Humans may accidentally or intentionally bring some species across natural barriers and these species may have certain advantages over native species. B Complete-the-Chart Questions The complete-the-chart question consists of a list of answer choices and a simple chart ETS calls this a Schematic Table . You have to place the answer choices into the correct categories to complete an outline of the passage. The answer choices can be phrases or sentences. In some questions there are seven choices and you must put five into the chart. In some questions there are nine choices and you must put seven into the chart. Correct choices are important characteristics of the different categories. There will be two or sometimes three categories of information. These categories represent concepts theories or divisions in the passage. Often they represent ideas that are compared or contrasted in the passage. Two of the answer choices cannot be placed into the chart. This is because they do not fit .
