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1 Read and choose.（读一读，选择正确的内容。）
A.tell people when to go or stop
B.keep them safe on the road
C.travel around easily
D.carry heavy things
① The wheel is a great invention.
It helps people
and
② Traffic lights are a great invention.
They
and
A.tell people when to go or stop
B.keep them safe on the road
C.travel around easily
D.carry heavy things
① The wheel is a great invention.
It helps people
C
and
D
.② Traffic lights are a great invention.
They
A
and
B
.答案
1 1. C, D 2. A, B
解析
【分析】
这道题需结合生活常识和英语短语含义选择内容：先理解句子描述事物的功能，轮子的作用是方便出行、搬运重物，交通灯的作用是指示行停、保障安全，据此匹配对应选项。
【解析】
1. 第一句描述轮子：轮子能帮助人们出行更便利，对应选项C；还能帮助搬运重物，对应选项D，故第一空选C，第二空选D。
2. 第二句描述交通灯：交通灯能告诉人们何时通行、何时停止，对应选项A；还能保障道路上人们的安全，对应选项B，故第三空选A，第四空选B。
【答案】
1. C, D
2. A, B
【知识点】
英语短语辨析；生活常识应用
【点评】
本题结合生活中常见发明，考查学生对英语短语的理解与实际应用，贴近生活，难度适中，适合巩固相关知识。
【难度系数】
0.6
这道题需结合生活常识和英语短语含义选择内容：先理解句子描述事物的功能，轮子的作用是方便出行、搬运重物，交通灯的作用是指示行停、保障安全，据此匹配对应选项。
【解析】
1. 第一句描述轮子：轮子能帮助人们出行更便利，对应选项C；还能帮助搬运重物，对应选项D，故第一空选C，第二空选D。
2. 第二句描述交通灯：交通灯能告诉人们何时通行、何时停止，对应选项A；还能保障道路上人们的安全，对应选项B，故第三空选A，第四空选B。
【答案】
1. C, D
2. A, B
【知识点】
英语短语辨析；生活常识应用
【点评】
本题结合生活中常见发明，考查学生对英语短语的理解与实际应用，贴近生活，难度适中，适合巩固相关知识。
【难度系数】
0.6
2 Read and say.（读一读课本中的短文，然后介绍轮子和交通信号灯这两种发明。）
答案
参考介绍示例：
1. 介绍轮子：The wheel is a great invention. It appeared a very long time ago. It helps people move heavy things easily. We can use wheels to make cars, bikes and many other transport tools, so we can travel to far places conveniently.
2. 介绍交通信号灯：Traffic lights are very useful inventions too. They make the road much safer. They tell people when to stop and when to go, they can keep the traffic in good order and avoid lots of traffic accidents.
1. 介绍轮子：The wheel is a great invention. It appeared a very long time ago. It helps people move heavy things easily. We can use wheels to make cars, bikes and many other transport tools, so we can travel to far places conveniently.
2. 介绍交通信号灯：Traffic lights are very useful inventions too. They make the road much safer. They tell people when to stop and when to go, they can keep the traffic in good order and avoid lots of traffic accidents.
解析
【分析】本题要求结合短文内容，用英语介绍轮子和交通信号灯两种发明，需围绕发明的出现时间、核心功能、对生活的影响这几个关键要素，组织通顺的英语语句，清晰表达两种发明的价值，符合介绍类表达的逻辑。
【解析】按照题目要求，分别对轮子和交通信号灯进行英语介绍，具体内容如下：1. 轮子介绍：The wheel is a great invention. It appeared a very long time ago. It helps people move heavy things easily. We can use wheels to make cars, bikes and many other transport tools, so we can travel to far places conveniently. 2. 交通信号灯介绍：Traffic lights are very useful inventions too. They make the road much safer. They tell people when to stop and when to go, they can keep the traffic in good order and avoid lots of traffic accidents.
【答案】1. 介绍轮子：The wheel is a great invention. It appeared a very long time ago. It helps people move heavy things easily. We can use wheels to make cars, bikes and many other transport tools, so we can travel to far places conveniently.2. 介绍交通信号灯：Traffic lights are very useful inventions too. They make the road much safer. They tell people when to stop and when to go, they can keep the traffic in good order and avoid lots of traffic accidents.
【知识点】英语介绍类写作、发明相关英语表达
【点评】本题考查学生的英语表达能力与对常见发明的认知，属于基础英语应用题型，贴近生活实际，难度适中。
【难度系数】0.5
【解析】按照题目要求，分别对轮子和交通信号灯进行英语介绍，具体内容如下：1. 轮子介绍：The wheel is a great invention. It appeared a very long time ago. It helps people move heavy things easily. We can use wheels to make cars, bikes and many other transport tools, so we can travel to far places conveniently. 2. 交通信号灯介绍：Traffic lights are very useful inventions too. They make the road much safer. They tell people when to stop and when to go, they can keep the traffic in good order and avoid lots of traffic accidents.
【答案】1. 介绍轮子：The wheel is a great invention. It appeared a very long time ago. It helps people move heavy things easily. We can use wheels to make cars, bikes and many other transport tools, so we can travel to far places conveniently.2. 介绍交通信号灯：Traffic lights are very useful inventions too. They make the road much safer. They tell people when to stop and when to go, they can keep the traffic in good order and avoid lots of traffic accidents.
【知识点】英语介绍类写作、发明相关英语表达
【点评】本题考查学生的英语表达能力与对常见发明的认知，属于基础英语应用题型，贴近生活实际，难度适中。
【难度系数】0.5
Think, write and complete.（仿照示例写单词，然后选择正确的单词完成对话。）
invent → invention
protect →
collect →
Xiaojiang, do you know who invented the first plane?
Sure, the Wright Brothers. When they were young, they always thought about one question: Why can birds fly in the sky?
Yes. They had a dream of flying someday. So they began to
Their
Their
invent → invention
protect →
protection
act
→ action (行动)collect →
collection
(收集)Xiaojiang, do you know who invented the first plane?
Sure, the Wright Brothers. When they were young, they always thought about one question: Why can birds fly in the sky?
Yes. They had a dream of flying someday. So they began to
collect
information and do some experiments (实验).Their
actions
made their dream come true. Finally, they invented the first plane.Their
invention
changed the world. They are so great!答案
protection, act, collection
collect, actions, invention
collect, actions, invention
解析
【分析】本题分为单词变形和对话填空两部分。单词变形需掌握动词变名词的常见构词规则，如protect变名词加-ion，collect变名词加-ion，action对应的动词为act；对话填空需结合语境，注意词性和形式：begin to后接动词原形，“their”后接名词，根据语义选择合适的单词。
【解析】1. 单词变形：protect的名词形式是protection；action对应的动词是act；collect的名词形式是collection。2. 对话填空：第一空，“begin to”后接动词原形，“收集信息”对应collect；第二空，“their”后接名词复数，结合语境“行动”用actions；第三空，“their”后接名词，结合语境“发明”用invention。
【答案】protection, act, collection；collect, actions, invention
【知识点】英语构词法、名词用法、动词用法
【点评】本题考查基础的英语构词知识和语境中单词的正确运用，难度适中，需要学生掌握常见的词缀变化和语境理解能力。
【难度系数】0.6
【解析】1. 单词变形：protect的名词形式是protection；action对应的动词是act；collect的名词形式是collection。2. 对话填空：第一空，“begin to”后接动词原形，“收集信息”对应collect；第二空，“their”后接名词复数，结合语境“行动”用actions；第三空，“their”后接名词，结合语境“发明”用invention。
【答案】protection, act, collection；collect, actions, invention
【知识点】英语构词法、名词用法、动词用法
【点评】本题考查基础的英语构词知识和语境中单词的正确运用，难度适中，需要学生掌握常见的词缀变化和语境理解能力。
【难度系数】0.6
