1选择题
Look at the picture. It shows the changes in a forest over 50 years. Which sentence best describes the change from 1970 to 2020?
- A. The number of trees has increased greatly.
- B. The forest has become much smaller.
- C. There are more animals living there now.
- D. The forest looks exactly the same.
答案：B
解析：本题结合图片信息考查对环境变化的描述。图片显示森林面积明显缩小，应选用一般现在时描述现状或现在完成时描述变化。A、C、D选项与图片信息不符。易错点在于忽视图片细节，或混淆时态（如用过去时描述现状）。故选B。
2选择题
根据下表关于不同出行方式碳排放量的数据，完成对话。— How do you usually go to school? — I ________ ride my bike. It's good for the environment.
- A. always
- B. hardly ever
- C. never
- D. seldom
答案：A
解析：本题结合表格数据考查频率副词。骑行是低碳出行方式，根据语境“It's good for the environment”可知说话者经常骑车，应选表示高频的“always”。B、C、D选项表示低频或否定，与环保语境矛盾。易错点在于忽略上下文逻辑，或混淆频率副词含义。故选A。
3选择题
Read the news report: 'The local government ________ build more nature reserves to protect endangered birds next year.' Choose the correct verb form.
- A. is going to
- B. was going to
- C. has gone to
- D. had gone to
答案：A
解析：本题结合新闻材料考查将来时态。时间状语“next year”表明是将来计划，应用be going to结构。B选项为过去将来时，C、D选项为完成时，均不符合语境。易错点在于混淆be going to与will的用法，或误判时态。故选A。
4选择题
The chart compares the air quality in two cities. City A has ________ PM2.5 level than City B, but City B has ________ green spaces.
- A. a higher; more
- B. a higher; fewer
- C. a lower; more
- D. a lower; fewer
答案：C
解析：本题结合图表考查形容词比较级。根据图表，City A的PM2.5水平较低（lower），City B的绿地更多（more）。易错点在于混淆比较级形式（单音节加-er/多音节加more）和可数/不可数名词的修饰词（fewer修饰可数名词，less修饰不可数名词）。故选C。
5填空题
根据短文内容和首字母提示填空：Many wild animals are in danger because people cut down too many trees and p________ their water. We should do something to protect them.
答案：pollute
解析：本题结合环保短文考查词汇拼写。根据语境“砍伐树木”和“污染水源”，结合首字母p，应填“pollute”（污染）。易错点在于拼写错误（如写成“polute”），或误用名词形式“pollution”。需注意动词原形与句子时态（一般现在时）一致。
6解答题
阅读下面关于垃圾分类的图表和说明，回答问题。
图表显示：可回收垃圾占比35%，厨余垃圾占比50%，有害垃圾占比5%，其他垃圾占比10%。
问题：What percentage of the waste is harmful to the environment if not handled properly? (根据图表回答)
答案：5% of the waste is harmful to the environment if not handled properly.
解析：本题结合图表信息考查数据提取与表达。有害垃圾占比5%。易错点在于读错数据，或回答不完整（如只写“5%”）。需注意用完整句子作答，并包含关键信息。
7解答题
根据情境完成对话。
A: Look at the river. It's so dirty! What happened?
B: I heard a factory ________ waste into it last week. (用所给动词的正确形式填空：pour)
答案：poured
解析：本题结合环境污染情境考查一般过去时。时间状语“last week”表明动作发生在过去，动词“pour”的过去式为“poured”。易错点在于忘记动词过去式变化规则，或误用现在完成时。需注意规则动词加-ed的拼写。
8解答题
写作任务：假设你是学校环保社团成员，根据下面提示，写一段80词左右的短文，介绍你们计划开展的环保活动。
提示：1. 活动名称：Green School Project
2. 内容：植树、节约用水、垃圾分类宣传
3. 目的：提高环保意识
要求：使用至少3种时态（如一般现在时、一般将来时、现在完成时）。
答案：Our school is going to start a 'Green School Project' next month. We plan to plant more trees around the school and teach students how to save water and sort waste. We have already prepared posters and leaflets to raise awareness. We hope everyone will join us to make our school greener and cleaner.
解析：本题结合环保情境考查综合写作能力。需涵盖活动名称、内容、目的，并正确使用多种时态。易错点在于时态混用（如该用将来时却用过去时），或遗漏提示要点。建议先列提纲，确保时态多样且准确。