Các khóa Trả lời cung cấp câu trả lời chính xác cho tất cả IHE bài tập thực hành và các câu đố cũng như tiến độ bốn chiều dài toàn bài kiểm tra. Các khóa Trả lời cung cấp tài liệu tham khảo cho các đơn vị có liên quan để xem xét và học tập. Các khóa Trả lời có thể dễ dàng được gỡ bỏ từ cuốn sách. | Test 4 Question 1 For this task you will write a response to a question about a reading passage and a short lecture. The question does not ask you to express your personal opinion. Read the passage and then listen to the recording. To make this practice more like the real test cover the passage and question during the lecture. You may take notes and you may use your notes to help you write your response. When you hear the question uncover the passage and question. Then allow 20 minutes to plan and write your response. Typically an effective response will have 150 to 225 words. Your response will be evaluated on the quality of your writing and on the completeness and accuracy of the content. Reading Time - 3 minutes During every season of the year earthworms and other soil dwellers are continuously at work in forests and gardens. The activities of earthworms have a beneficial effect on the physical and chemical properties of the soil. Earthworms are responsible for mixing forest duff the decaying organic matter on the forest floor deeper into the soil. This breaks down the layers of soil and several inches of the hardpan below. Earthworms aerate the soil by their burrowing and they add mucus that holds the fine soil particles together. In the garden earthworms do the same thing they move organic matter from the surface deeper into the soil. They play an essential role in the compost pile where they feed on grass clippings and other plant matter and excrete the indigestible portions as castings which are then eaten by beneficial soil microbes. In this way earthworms accelerate the decomposition of the compost pile and aid in the production of organic fertilizer. Among sports fishers who use a hook and line earthworms are the bait of choice. The most popular bait worms are large night crawlers and the smaller common species known as Lumbricus rubellus. Both kinds of worms are readily available in fishing shops or the old-fashioned way by digging in the back yard. .
