八年级下册第3单元试卷(原卷) 沪教版八年级下U3培优测试卷 学校:_____班级:_____姓名:_____考号:_____ 一、语法选择(共15小题,每小题1分,满分15分) 阅读下面短文,从1-15各题所给的A、B、C、D四个选项中选出最佳选项。 In 2023, a group of scientists discovered a new way to recycle plastic waste. They found that certain bacteria (细菌) could break down plastic into harmless materials. This discovery 1 a big step in solving the problem of pollution. Plastic pollution 2 a serious threat to our planet for decades. Many animals mistake plastic for food and die after eating it. However, the new method 3 hope to both humans and nature. The bacteria 4 in labs for years, but their ability to digest plastic 5 until recently. “This is not just a scientific breakthrough,” said Dr. Lee, the team leader. “It 6 a practical solution. We plan to use these bacteria in recycling centers 7 2025.” The team also mentioned that the process 8 very little energy, making it environmentally friendly. While some people worry about the safety of using bacteria, Dr. Lee explained, “The bacteria 9 harmful. They only target specific types of plastic.” The team’s next goal is 10 the process faster and more efficient. This innovation reminds us 11 small actions can lead to big changes. If everyone 12 to reduce plastic use, our planet 13 a cleaner place. Let’s work together 14 a greener future. 1.A. is B. was C. has been D. will be 2.A. is B. was C. has been D. had been 3.A. offer B. offers C. offered D. has offered 4.A. studied B. were studied C. have studied D. have been studied 5.A. isn’t known B. wasn’t known C. hasn’t known D. hadn’t known 6.A. provides B. provided C. is providing D. will provide 7.A. by B. in C. on D. at 8.A. requires B. required C. is requiring D. will require 9.A. aren’t B. isn’t C. wasn’t D. hasn’t been 10.A. make B. to make C. making D. made 11.A. that B. what C. how D. why 12.A. tries B. tried C. will try D. try 13.A. becomes B. became C. will become D. has become 14.A. create B. creating C. to create D. created 二、完形填空(共10小题,每小题1.5分,满分15分) 阅读下面短文,从16-25各题所给的A、B、C、D四个选项中选出最佳选项。 Have you ever heard of “digital detox” It means taking a break from electronic devices like smartphones and computers. Recently, a study showed that teenagers who tried a digital detox felt 15 and more focused. Last month, my school organized a 24-hour digital detox challenge. At first, I felt 16 because I couldn’t check my messages. But soon, I started to notice things I usually ignored. For example, I 17 a beautiful sunset and had a long talk with my grandma. The next day, our teacher asked us to share our experiences. Some students said they 18 bored at first, but later enjoyed reading books or playing board games. Others found it 19 to concentrate on homework without distractions. This activity taught me that technology isn’t always necessary. Sometimes, 20 from screens helps us reconnect with the real world. Now, I ... ...
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