英语同步训练
3. What can we infer about Earth according to David’s views?
A. Alien plants are likely to harm Earth’s environment.
B. Humans alone may not be able to solve global warming.
C. David believes aliens are the only hope for Earth’s future.
D. Global warming will soon be solved by human technology alone.
4. What does Paul think might happen if aliens come to Earth?
A. They might harm Earth’s ecosystem.
B. They might help us develop new technology.
C. They might control us with their technology.
D. They might help us with environmental problems.
5. What’s the passage mainly about?
A. The good points of inviting aliens to Earth.
B. The way of sending a radio message into space.
C. The possible dangers of inviting aliens to Earth.
D. A discussion about if we should invite aliens to Earth.

3. B
4. A
5. D

【分析】
本题为英语阅读理解的细节推理题与主旨大意题，需结合文中人物观点及文章核心内容逐一分析选项：第3题需定位David的观点，判断关于地球的合理推断；第4题需明确Paul对外星人到访地球的看法；第5题需归纳全文核心讨论主题。
【解析】
3. 针对David的观点：A选项“外星植物可能危害地球环境”并非David的核心推断；C选项“外星人是地球未来的唯一希望”表述绝对，不符合原文；D选项“人类技术单独很快解决全球变暖”与David观点相悖；B选项“人类单独可能无法解决全球变暖”符合David的看法，故答案为B。
4. 针对Paul的看法：B选项“帮助发展新技术”、C选项“用科技控制人类”、D选项“帮助解决环境问题”均不符合Paul的观点；A选项“可能危害地球生态系统”符合Paul的推断，故答案为A。
5. 全文围绕David和Paul两人关于“是否应该邀请外星人到地球”展开讨论，A选项仅提及好处、C选项仅提及危险，均片面；B选项“发送无线电信号”未在文中涉及，故主旨为D，答案为D。
【答案】
3.B；4.A；5.D
【知识点】
英语阅读理解推理判断；英语阅读理解主旨大意
【点评】
本题考查英语阅读理解中人物观点的推理及文章主旨的归纳，需准确提取文中关键信息，难度适中。
【难度系数】
0.6

Ⅰ. 用所给单词的适当形式填空
1. The (science) works hard to study stars and planets in space.
2. We need a bit (much) information to understand how rockets work.
3. Satellites are very (use) for sending messages and taking pictures of Earth.
4. Astronauts must be good (listen) when they follow instructions from ground control.
5. Astronauts study hard (improve) their knowledge of space.

1. scientist 2. more 3. useful 4. listeners 5. to improve

【分析】
本题考查英语单词的适当形式填空，需结合句子结构、词性、固定搭配等分析：
1. 第一题：句子缺主语，指从事科学研究的人，需将表示“科学”的名词science转换为表示人的名词scientist；
2. 第二题：a bit用于修饰形容词/副词的比较级，much的比较级是more，符合“更多一点信息”的语义；
3. 第三题：be动词are后需接形容词作表语，需将动词use转换为形容词useful；
4. 第四题：主语Astronauts是复数，good后需接名词，需将动词listen转换为表示人的名词listener，且用复数形式对应复数主语；
5. 第五题：study hard的目的是提升太空知识，需用不定式作目的状语。
【解析】
1. 空格处作主语，指人，将science变为scientist，故填scientist；
2. a bit修饰比较级，much的比较级为more，故填more；
3. be动词后接形容词，use的形容词形式是useful，故填useful；
4. 主语为复数，good后接名词，listen的名词listener变复数listeners，故填listeners；
5. 表目的用不定式结构，故填to improve。
【答案】
1. scientist 2. more 3. useful 4. listeners 5. to improve
【知识点】
词性转换、形容词作表语、不定式作目的状语
【点评】
本题为初中英语基础词汇变形题，考察学生对单词词性转换、比较级用法及不定式功能的掌握，题型常规，难度适中。
【难度系数】
0.8

Ⅱ. 用方框中所给短语的适当形式填空
sound crazy, at some point, human being, deal with, run out of, in that case
Have you ever thought about why humans spend so much money on space travel?
Many people think space exploration 1. because it's so hard and costly. But 2. , Earth may not have enough resources for every human being. We might 3. clean water, air, or land to grow food. How can we 4. such a big problem? One smart idea is to explore other planets, like Mars. 5. , space travel is not just for fun. It's a real backup plan for the future of 6. .

1. sounds crazy 2. at some point 3. run out of 4. deal with 5. In that case 6. human beings

【分析】首先明确方框内各短语的含义：sound crazy（听起来疯狂）、at some point（在某个时候）、human being（人类，复数为human beings）、deal with（处理）、run out of（用完，耗尽）、in that case（既然那样）。接着逐句分析语境与句子语法要求：1. 句中主语space exploration是单数，需谓语动词短语，结合“难且贵”的语境，选sound crazy并调整为第三人称单数形式；2. 此处需时间状语，结合语境选at some point；3. 情态动词might后接动词原形，结合“用完资源”的语境选run out of；4. 情态动词can后接动词原形，结合“处理问题”的语境选deal with；5. 此处需承接上文的过渡短语，句首大写，选In that case；6. 此处指“人类”这一群体，需用名词复数，选human being的复数形式human beings。
【解析】1. 主语space exploration为单数，一般现在时中谓语动词用第三人称单数形式，故填sounds crazy；2. 结合语境“在某个时候”，填介词短语at some point；3. 情态动词might后接动词原形，run out of表示“用完”，符合语境，填run out of；4. 情态动词can后接动词原形，deal with表示“处理”，符合语境，填deal with；5. 此处为过渡短语，句首需大写，In that case表示“既然那样”，符合语境，填In that case；6. 表示“人类”这一群体，需用名词复数，human being的复数为human beings，填human beings。
【答案】1. sounds crazy 2. at some point 3. run out of 4. deal with 5. In that case 6. human beings
【知识点】动词短语适当形式；名词单复数；介词短语用法
【点评】本题考查短语在语境中的灵活运用，需结合句子语法（如主谓一致、情态动词后接原形等）和语境含义确定短语的正确形式，属于基础题型，注重对核心短语的积累与运用。
【难度系数】0.5

Ⅲ. 补全对话
根据下面的对话情景，在空白处填入一个适当的句子，使对话的意思连贯、完整。
(Anna and Bob are talking about
reasons for space exploration.)
Anna: Hi, Bob. 1.
Bob: Well, there are three reasons to explore space.
Anna: Could you tell me the first reason?
Bob: 2.
First, to improve our knowledge of Earth and its place in the universe.
Anna: I see. 3.
Bob: Second, space technology can help us here on Earth. For example, some satellites help us deal with climate change.
Anna: 4.
And the third reason?
Bob: The third reason is about our future. Our Earth may run out of resources. In that case, we need a new home for us human beings.
Anna: That sounds interesting. Maybe we will live on Mars one day.
Bob: 5.

1. Why do we explore space? 2. Sure. / Of course. / Certainly. / No problem. 3. What about the second reason? / What is the second reason? 4. That's really useful. 5. That's true. / Exactly. / Maybe you are right.

【分析】
本题为补全对话，需结合上下文语境推断空白处应填的句子。对话围绕太空探索的原因展开，Bob明确提到有三个原因，据此可依次推导每个空白处的内容：第一空Anna应询问太空探索的原因；第二空Bob回应同意回答第一个原因；第三空Anna询问第二个原因；第四空Anna对Bob提到的卫星帮助应对气候变化表示认可；第五空Bob赞同Anna关于未来可能住火星的说法。
【解析】
1. 根据Bob的回答“Well, there are three reasons to explore space.”可知，Anna此处应询问太空探索的原因，故填Why do we explore space?
2. 根据Anna的提问“Could you tell me the first reason?”可知，Bob此处应表示同意回答，故填Sure. / Of course. / Certainly. / No problem.
3. 根据Bob接下来回答的“Second, space technology can help us here on Earth.”可知，Anna此处应询问第二个原因，故填What about the second reason? / What is the second reason?
4. 根据Bob提到的“some satellites help us deal with climate change.”可知，Anna此处应表示认可，故填That's really useful.
5. 根据Anna说的“Maybe we will live on Mars one day.”可知，Bob此处应表示赞同，故填That's true. / Exactly. / Maybe you are right.
【答案】
1. Why do we explore space? 2. Sure. / Of course. / Certainly. / No problem. 3. What about the second reason? / What is the second reason? 4. That's really useful. 5. That's true. / Exactly. / Maybe you are right.
【知识点】
补全对话、情景交际
【点评】
本题为日常情景对话补全题，考查学生对语境逻辑的理解能力，需结合上下文推导合适的句子，难度较低。
【难度系数】
0.3