四、阅读理解
Nowadays more and more people have discovered the joy of DIY. It can not only turn waste into treasure, but also develop your creativity. Moreover, it can make your boring time more interesting. Here's a simple way to build your own musical instrument with used shoeboxes.
Required items: a shoebox with lid, glue, 4 to 6 rubber bands (橡皮筋), scissors.
Step-by-step instructions:

So next time when you're bored at home after finishing your homework, try making something new with everyday items around you instead of wasting time on short videos or computer games.
（）1. Why is the folded circle glued next to the circular opening?
A. To divide the shoebox into different parts.
B. To cover the hole so the sound will be louder.
C. To create a fret that lifts the rubber bands slightly.
D. To make the shoebox guitar look more like a real one.
（）2. Which is the most suitable word for " "?
A. longer B. thicker C. softer D. thinner
（）3. The passage mainly shows us .
A. how to design the fret of a shoebox guitar
B. how to turn a shoebox into a musical instrument
C. why trying DIY is better than spending time on screens
D. why people should learn to use waste materials creatively

1.C 2.D 3.B

【分析】
第1题需定位原文步骤③，查找折叠圆粘在圆孔旁的原因；第2题需结合步骤④的橡皮筋参数与音高的关系，结合物理常识判断合适的词汇；第3题需梳理全文核心内容，归纳主旨。
【解析】
1. 定位原文步骤③：“This will serve as a fret, which is the part on a regular guitar that raises the strings slightly above the neck.”，可知该操作是为了制作琴格（fret），稍微抬起橡皮筋，对应选项C。
2. 步骤④提到用不同厚度、长度的橡皮筋制作不同音高，根据物理知识，橡皮筋越细（thinner），振动频率越高，音高越高，符合“the higher the pitch”的要求，故选D。
3. 全文围绕用旧鞋盒制作乐器的步骤展开，核心是展示如何将鞋盒变为乐器，对应选项B。
【答案】
1.C 2.D 3.B
【知识点】
阅读理解（细节理解）、阅读理解（主旨大意）
【点评】
本题为英语阅读理解题，结合DIY制作乐器的内容，考查细节查找、推理判断和主旨归纳能力，需学生精准定位原文信息，结合常识解题。
【难度系数】
0.6