Ⅰ. Complete the chat history with if or because.
Team Chat Class 9 Art Club(6)
Yesterday, 15:00 p. m.
Teacher Li(Group Leader): Let's talk about our traditional art show for the School Culture Festival! 1. many arts are in danger today, we want to protect our folk arts.

Lina:
I feel proud of shadow puppetry 2. it is a beautiful part of our traditional culture.
Amy:
3. fewer young people learn sugar painting, this craft will disappear soon.
Some old crafts are dying out 4. there are not enough young people to pass them on.
Lily:
5. I master clay sculpture, I will teach kids in my neighborhood this skill. I also want to learn face-changing 6. it looks so amazing and cool.
Tom:
7. our school holds a paper-cutting fair next month, I will join it with my friends.
Many of my classmates love folk music 8. it has a special charm we can't find in pop songs.
David:
9. we share our works on short-video platforms, more teenagers will get to know these arts. 10. I practice calligraphy every day, I will be ready for the traditional art competition.

1. Because 2. because 3. If 4. because 5. If 6. because 7. If 8. because 9. If 10. If

【分析】首先明确if和because的用法：because引导原因状语从句，表“因为”，说明主句动作的原因；if引导条件状语从句，表“如果”，说明主句动作发生的条件。再结合每个句子的逻辑关系判断：1句“很多艺术濒危”是“要保护民间艺术”的原因；2句“皮影戏是传统文化的美丽部分”是“为它骄傲”的原因；3句“更少年轻人学糖画”是“工艺会消失”的假设条件；4句“没有足够年轻人传承”是“老工艺消失”的原因；5句“掌握泥塑”是“教孩子”的条件；6句“变脸看起来酷”是“想学变脸”的原因；7句“学校办剪纸展”是“参加”的条件；8句“民乐有特殊魅力”是“同学爱民乐”的原因；9句“分享作品到短视频”是“更多青少年了解”的条件；10句“每天练书法”是“准备比赛”的条件。
【解析】1. 空格后内容是主句动作的原因，填Because；2. 空格后内容是主句动作的原因，填because；3. 空格后内容是主句动作的假设条件，填If；4. 空格后内容是主句动作的原因，填because；5. 空格后内容是主句动作的条件，填If；6. 空格后内容是主句动作的原因，填because；7. 空格后内容是主句动作的条件，填If；8. 空格后内容是主句动作的原因，填because；9. 空格后内容是主句动作的条件，填If；10. 空格后内容是主句动作的条件，填If。
【答案】1. Because 2. because 3. If 4. because 5. If 6. because 7. If 8. because 9. If 10. If
【知识点】原因状语从句、条件状语从句、连词用法
【点评】本题考查if与because引导的状语从句的区分，需结合句子逻辑判断语义，属于英语基础语法的常考题型，侧重对基础用法的掌握。
【难度系数】0.7

Ⅱ. Rewrite the sentences with if or because.
1. I want to show paper-cutting. It is full of Chinese traditional beauty.
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2. We prepare more traditional programs. The festival will be more wonderful.
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3. Some traditional arts are not popular now. Few teenagers know about them.
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4. We put on shadow puppetry shows. More students will fall in love with folk arts.
→
→
5. We work together. We can make the art festival a big success.
→

1. I want to show paper-cutting because it is full of Chinese traditional beauty. 2. If we prepare more traditional programs, the festival will be more wonderful. 3. Some traditional arts are not popular now because few teenagers know about them. 4. If we put on shadow puppetry shows, more students will fall in love with folk arts. 5. If we work together, we can make the art festival a big success.

【分析】做此类改写题，需先判断两个分句的逻辑关系：若为因果关系，用because连接；若为条件关系，用if连接。改写时注意：because引导的原因状语从句可放在主句后；if引导的条件状语从句常放句首，且遵循对应时态规则。
【解析】1. 原句中“想展示剪纸”是结果，“充满中国传统美”是原因，用because连接原因状语从句，改写为：I want to show paper-cutting because it is full of Chinese traditional beauty. 2. 原句中“准备更多传统节目”是“节日更精彩”的条件，用if引导条件状语从句，从句用一般现在时，主句用一般将来时，改写为：If we prepare more traditional programs, the festival will be more wonderful. 3. 原句中“传统艺术不受欢迎”是结果，“很少青少年知道它们”是原因，用because连接，改写为：Some traditional arts are not popular now because few teenagers know about them. 4. 原句中“上演皮影戏表演”是“更多学生爱上民间艺术”的条件，用if引导条件状语从句，改写为：If we put on shadow puppetry shows, more students will fall in love with folk arts. 5. 原句中“一起努力”是“艺术节成功”的条件，用if引导条件状语从句，改写为：If we work together, we can make the art festival a big success.
【答案】1. I want to show paper-cutting because it is full of Chinese traditional beauty. 2. If we prepare more traditional programs, the festival will be more wonderful. 3. Some traditional arts are not popular now because few teenagers know about them. 4. If we put on shadow puppetry shows, more students will fall in love with folk arts. 5. If we work together, we can make the art festival a big success.
【知识点】原因状语从句、条件状语从句
【点评】本题考查英语中原因状语从句和条件状语从句的基本运用，核心是判断分句间的逻辑关系并正确使用对应连词，属于初中英语基础语法题，需掌握连词的用法和从句的基本结构。
【难度系数】0.5