[New TOEFL Listening Practice] Test 73: Making Inference & Prediction (exercise 2)

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Xuất bản 15/08/2015
Practice these TOEFL iBT listening tests to help you score high in the TOEFL Listening Section. Check the correct answers and audio transcripts below. This video is in the series of NEW TOEFL iBT Preparation: https://www.youtube.com/playlist?list=PL2jvSGmpWX1UMjbc8Onae7i-R6Z8VcPbU. Questions 1 through 2. Listen to an art instructor talk about composition. Composition is the organization of shapes and forms into a whole - an expressive whole. The elements of composition - line, shape, tone, and color - need to be well arranged, need to be ordered. They need to be coherent ... just like the words and phrases and sentences in a piece of writing. All paintings have a compositional element. Successful paintings sort of suggest the third dimension, the sense that the design goes beyond the picture frame. A picture’s unity - which includes the shapes, tones and colors —is linked to what the artist has to say. The artist's message is strongest when it’s clear. A composition is better if it says one thing strongly than if it tries to say too many things. A crowded composition is sort of fussy and splintered and lacks unity. Even a painting of a single object needs thoughtful composition so the character of the object is present in every shape. Correct Answers: 1. A 2. A composition must contain numerous subjects to be interesting. - Disagree If a picture is too crowded, it does not possess the element of unity. - Agree A successful composition conveys a single, clear message. - Agree -------------------- Questions 3 through 6. Listen to part of a talk in a biology class. Biology is considered one of the natural sciences. It is the science of life and life’s processes. And like life, science is better understood by observing it than by trying to create a precise definition. Over the next fifteen weeks, we will be observing the science of biology. In many ways, biology is the most demanding of all sciences. This is partly because living systems are so complex. Biology is also a multidisciplinary science. It requires knowledge of chemistry, physics, and mathematics. And of all the sciences, biology is the most linked to the social sciences and humanities. The word “science” comes from a Latin verb meaning "to know”. Science is a way of knowing. It emerges from our curiosity about ourselves and our world. Striving to understand is one of our basic drives. Who are scientists? Scientists are people who ask questions about nature and who believe that these questions can be answered. Scientists arc explorers who arc passionate about discovery. This course has something for all of you to discover. If you’re a biology major or a pre-medical student, you'll discover ways to become a better scientist. If you're a physical science or engineering major, you'll discover in biology many applications for what you’ve learned in your other science courses. And if you’re a non-science major, you’ve chosen a course in which you can sample many disciplines of discovery. Correct Answers: 3. D 4. A & C 5. D 6. C -------------------- Questions 7 through 10. Listen to a lecture in a botany class. The professor is talking about plant hormones. The word "hormone" is derived from a Greek verb that means “to excite." Hormones are found in all multi-cellular organisms and function to coordinate the parts of the organism. A hormone is a chemical signal. It's produced by one part of the body and is then transported to other parts of the body, where it triggers responses in cells and tissues. The concept of chemical messengers in plants first emerged from a series of classic experiments on how plant stems respond to light. Think about this. A houseplant on a windowsill grows toward light. If you rotate the plant, it will soon reorient its growth until its leaves again face the window. The growth of a plant toward light is called "phototropism”. In a forest or other natural ecosystem where plants may be crowded, phototropism directs growing seedlings toward the sunlight that powers photosynthesis. Some of the earliest experiments on phototropism were conducted in the late nineteenth century by Charles Darwin and his son, Francis. The Darwins observed that a grass seedling could bend toward light only if the tip of the shoot was present. If the tip was removed, the shoot would not curve toward light. The seedling would also fail to grow toward light if the tip was covered with an opaque cap. The Darwins proposed the hypothesis that some signal was transmitted downward from the tip into the part of the stem that controlled growth. Later experiments by other scientists studying phototropism led to the discovery of chemical messengers that stimulated growth in the stem. These chemical messengers were hormones. Correct Answers: 7. C 8. B 9. B & C 10. D
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