第21题: [单项选择]{{B}}Questions 32 to 35 are based on the passage you have just heard.{{/B}} A. Storms and floods. B. Disease and fire. C. Rapid increase of the animal population. D. Less space for their growth. 参考答案:B 答案解析:[听力原文]
What will be a possible threat to plants in the future
[解析] 推理判断题。本题提问的对象是植物。解答本题的关键在于短语