B
The smart pencil box is a new kind of school products, and it has become more and more popular among students recently. Different from traditional pencil boxes, it can bring great convenience to students' studies and life.
A smart pencil box usually has a built-in power bank, so students can charge their smart watches or earphones when they need it. It can also remind them to do something. If they set a time for doing homework or having classes, it will ring softly, helping them form a good time management habit. What's more, some smart pencil boxes can connect to their phones by Bluetooth. When students can't find their pencil boxes, they can use their phones to make the boxes send a short and high sound, which saves them from the trouble of looking for the boxes everywhere. They also keep things on the desk tidy. And some smart pencil boxes even have a small LED light for studying in dark places.
Smart pencil boxes solve some small problems in students' daily life. As technology develops, they will have more functions to serve students better, making studying easier and more enjoyable.
根据材料内容选择最佳答案。
()4. What can students do with the built-in power bank of a smart pencil box?
A. Charge watches or earphones.
B. Light up the study place.
C. Connect to Bluetooth.
D. Set homework reminders.
()5. How can a smart pencil box help students find it easily?
A. It will ring loudly by itself all the time.
B. It will send a message to the student's phone.
C. It has a bright LED light to show its position.
D. A short and high sound is made by Bluetooth.
()6. What is the main idea of Paragraph 2?
A. How to choose a smart pencil box.
B. Useful functions of a smart pencil box.
C. Smart pencil boxes among students.
D. Smart and traditional pencil boxes.
()7. What can we infer from the passage?
A. Smart pencil boxes can finish homework without thinking.
B. Smart pencil boxes can stop students from losing all their studying tools.
C. Smart pencil boxes can help students get higher grades in exams directly.
D. Smart pencil boxes can help students develop good time management habits.
()8. What's main value of smart pencil boxes for students according to the passage?
A. They look more fashionable.
B. They can replace phones.
C. They solve small daily problems.
D. They are much cheaper to buy.

4. A 5. D 6. B
7. D 由原文第二段“helping them form a good time management habit”可知，智能文具盒可以帮学生养成好的时间管理习惯。
8. C 由原文末段“smart pencil boxes solve some small problems in students' daily life”可知答案。

【分析】做这类阅读理解题，需先明确题目考查类型（细节理解、主旨大意、推理判断等），再带着关键词回原文定位对应内容，将选项与原文信息逐一比对，排除干扰项后选出正确答案。细节题要精准匹配原文语句，主旨题需概括段落核心，推断题要基于原文合理推导，不可主观臆断。
【解析】
4. 细节理解题：根据原文第二段第一句“A smart pencil box usually has a built-in power bank, so students can charge their smart watches or earphones when they need it.”可知，内置充电宝的作用是给智能手表或耳机充电，对应选项A。
5. 细节理解题：根据原文第二段“some smart pencil boxes can connect to their phones by Bluetooth. When students can't find their pencil boxes, they can use their phones to make the boxes send a short and high sound”可知，智能文具盒通过蓝牙发出短而高的声音帮助学生找到它，对应选项D。
6. 主旨大意题：第二段主要介绍了智能文具盒的多种实用功能，如充电、时间提醒、蓝牙定位、LED灯等，核心围绕其功能展开，对应选项B。
7. 推理判断题：根据原文第二段“helping them form a good time management habit”可知，智能文具盒能帮助学生养成良好的时间管理习惯，选项D正确；A项“完成作业”、B项“阻止丢失所有学习工具”、C项“直接提高考试分数”均与原文不符，排除。
8. 主旨大意题：根据原文末段第一句“Smart pencil boxes solve some small problems in students' daily life.”可知，智能文具盒的主要价值是解决学生日常生活中的小问题，对应选项C。
【答案】4.A 5.D 6.B 7.D 8.C
【知识点】阅读理解细节理解题、阅读理解主旨大意题、阅读理解推理判断题
【点评】本文是介绍智能文具盒的说明文，题目类型全面，侧重考查学生对原文信息的定位、理解与概括能力，整体难度不大，只要仔细阅读原文即可准确作答。
【难度系数】0.7