TAILIEUCHUNG - The official guide to the toefl ibt third edition part 55

Tham khảo tài liệu 'the official guide to the toefl ibt third edition part 55', ngoại ngữ, toefl - ielts - toeic phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Reading 14. Directions An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points. Several suggestions ranging from light conditions to the presence of metallic compounds have been offered to explain why some icebergs appear green. 1. Ice cores were used to determine that green icebergs were formed from the compaction of metallic compounds including copper and iron. 2. All ice shelves can produce green icebergs but the Amery Ice Shelf is especially well suited to do so. 3. Green icebergs form when a two-layer block of ice breaks away from a glacier and capsizes exposing the bottom sea ice to view. Answer Choices 4. Ice cores and samples revealed that both ice shelves and green icebergs contain a layer of bubbly glacial ice and a layer of bubble-free sea ice. 5. Green icebergs are white until they come into contact with seawater containing platelets and soluble organic green pigments. 6. In a green iceberg the sea ice contains large concentrations of organic matter from the seawater. STOP. This is the end of the Reading section of TOEFL iBT Practice Test 2 369 This page intentionally left blank LISTENING Directions This section measures your ability to understand conversations and lectures in English. You should listen to each conversation and lecture only one time. After each conversation or lecture you will answer some questions about it. The questions typically ask about the main idea and supporting details. Some questions ask about a speaker s purpose or attitude. Answer the questions based on what is stated or implied by the speakers. You may take notes while you listen. You may use your notes to help you answer the questions. Your notes will not be scored.

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