一、听教材录音，回答问题
1. What does Captain Troy ask Liz and Gus to do?
2. When will the mothership land?
3. Where do Liz and Gus want the mothership to land at the beginning? ______
4. What is not easy to decide according to Captain Troy?

1. To stay calm and get to the landing site in less than 48 hours. 2. The day after
tomorrow. 3. They want the mothership to land near them at the beginning. 4. It is not easy
for them to decide which things to carry/what must be left behind.

二、构建关联
If you were Liz and Gus, what would you carry with you in such a situation?

We would take the radio, oxygen tanks, water bottles, and our notes about the alien's
signs—to stay safe and remember our new friends.

【分析】
本题为英语开放性情景表达题，需假设自己是Liz和Gus，结合合理的安全、生存、纪念等需求，用第一人称复数+虚拟语气（would）的结构，回答在对应情境下携带的物品及原因，符合情景逻辑即可。
【解析】
首先确定答题主体为第一人称复数（对应Liz和Gus两人），使用虚拟语气表达假设情况；其次选择贴合安全、生存、纪念的合理物品，如无线电（用于求救）、氧气瓶（保障安全）、水瓶（维持生存）、关于外星人标识的笔记（纪念新朋友），最后补充携带这些物品的目的，使回答完整合理。
【答案】
We would take the radio, oxygen tanks, water bottles, and our notes about the alien's signs—to stay safe and remember our new friends.
【知识点】
英语情景表达、虚拟语气应用、物品列举与原因说明
【点评】
本题为开放性情景问答，既考查虚拟语气的语法运用，又要求结合实际逻辑表达内容，贴近生活需求，能锻炼学生的情景表达能力。
【难度系数】
0.5

一、用because或because of填空
A writer created an alien character 1. he wanted to show the friendship in the universe. He set the story on a strange planet that looked very different from the Earth 2. its bright blue sky and two suns. In the book, the heroes could travel quickly between stars 3. their spaceship used a special kind of energy. 4. this interesting and imaginative story, the novel became very popular among young readers. The writer also included a helpful robot character 5. it could cleverly help the heroes solve their problems.

1. because 2. because of 3. because 4. Because of 5. because

【分析】首先明确because和because of的用法区别：because是连词，用于引导原因状语从句，后接完整的句子；because of是介词短语，后接名词、代词、动名词或名词性短语，不能接句子。解题时需先判断每个空后是句子还是名词短语，再选择合适的词。
【解析】1. 空后“he wanted to show the friendship in the universe”是完整句子，需用连词because引导原因状语从句；2. 空后“its bright blue sky and two suns”是名词短语，需用介词短语because of；3. 空后“their spaceship used a special kind of energy”是完整句子，用because；4. 空后“this interesting and imaginative story”是名词短语，且位于句首，首字母大写，故用Because of；5. 空后“it could cleverly help the heroes solve their problems”是完整句子，用because。
【答案】1. because 2. because of 3. because 4. Because of 5. because
【知识点】because的用法、because of的用法
【点评】本题考查because与because of的基础用法，属于英语语法中原因状语的核心考点，需准确区分连词与介词短语的用法差异，难度适中，适合巩固基础。
【难度系数】0.6

二、用适当的连词补全对话
Ms Lee: Today, let's discuss why we haven't met aliens yet.
Li Hua: I think it's 1. space is too big. The nearest star is very, very far away.
Zhang Wei: Yes, 2. it takes thousands of years for light to reach us, maybe alien signals haven't arrived yet.
Wang Fang: 3. we only started using radios about 100 years ago, we might have missed their messages long ago.
Li Hua: That's true. 4. the huge distances, even if aliens exist, contact is extremely difficult.
Ms Lee: What wonderful ideas! All these reasons make contact very hard, 5. it's not surprising we haven't met them yet.
Zhang Wei: But we should keep exploring!

1. because 2. since / and / because 3. As / Because / Since 4. Because of 5. so

【分析】
做这类连词补全对话的题目，需先分析每个空格前后的逻辑关系（原因、结果等），再结合连词的用法（接从句还是名词短语）选择合适的连词。具体步骤：1. 判断空格前后是原因、结果还是并列等关系；2. 明确空格后是完整句子还是名词短语，确定用从句连词还是介词短语；3. 匹配对应用法的连词完成填空。
【解析】
1. 空格后是完整句子“space is too big”，是解释“没遇到外星人”的原因，位于be动词后，用because引导表语从句表原因；
2. 空格后是完整句子“it takes thousands of years for light to reach us”，表原因，可用since、because引导原因状语从句，也可用and连接并列的原因分句；
3. 空格后是完整句子“we only started using radios about 100 years ago”，表原因，As、Because、Since均可引导原因状语从句；
4. 空格后是名词短语“the huge distances”，需用介词短语because of接名词表原因；
5. 前半句说明“联系困难”的原因，后半句引出“没遇到外星人不奇怪”的结果，用so表结果。
【答案】
1. because 2. since / and / because 3. As / Because / Since 4. Because of 5. so
【知识点】
原因状语从句连词、介词短语用法、结果连词
【点评】
本题为对话型连词填空题，侧重考查学生对不同功能连词的辨析与运用，需结合句子逻辑和结构判断，属于英语基础题型，难度适中。
【难度系数】
0.6