第11题: [填空题]The rainforests are home to one-third of the Earth’s plant and animal species. 参考答案:N 答案解析:在文章的“What Makes the Tropical Rainforest Special "一段中指出“The rainforests are home to half of the Earth
第30题: [单项选择]The policeman kept his eyes ________ on the screen of the computer to identify the criminal's footprints. A. fixed B. fixing C. being fixed D. to fix 参考答案:A 答案解析:“keep one's eyes fixed on sth”意为“眼睛紧盯着……”。