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题是细节理解题，需定位文中步骤③的说明，明确折叠圆粘贴的目的；第2题是推理判断题，结合物理常识（弦越细振动频率越高，音高越高）和文中不同厚度橡皮筋产生不同音高的描述判断；第3题是主旨大意题，梳理全文核心内容，确定文章围绕的主题。
【解析】
1. 细节理解题：根据文中步骤③的内容“This will serve as a fret, which is the part on a regular guitar that raises the strings slightly above the neck.”可知，将折叠的圆粘贴在圆孔旁是为了制作能稍微抬起橡皮筋的品丝，对应选项C。
2. 推理判断题：根据物理知识，橡皮筋越细，振动频率越高，音高越高；文中提到不同厚度的橡皮筋可产生不同音高，因此“越细的橡皮筋，音高越高”，对应选项D。
3. 主旨大意题：全文围绕“用旧鞋盒制作乐器”的DIY步骤展开，介绍了所需材料和操作方法，核心是展示如何将鞋盒变成乐器，对应选项B。
【答案】1.C 2.D 3.B
【知识点】
英语阅读理解、细节理解、主旨大意
【点评】
本题是结合DIY实践的英语阅读理解，考查学生细节查找、推理判断和主旨归纳能力，内容贴近生活，难度适中，学生需仔细阅读原文并结合常识解题。
【难度系数】
0.6