This winter, a special down jacket becomes very popular in China. It is very light. You can see many small lines on it. It comes in black, white, grey, pink, and blue. Some have high necks, and some have hoods (帽子). You can even fold it and put it into a small bag.

Many people share photos of this jacket on apps like Xiaohongshu and Douyin. Soon, you see it everywhere: on the street, in schools, and on the subway.

Students love it because it is both warm and cool in style. Young people wear it when going out with friends. Adults also wear it to work. Even grandparents like it because it is very comfortable.

1.1.What is very popular in China this winter?

A A warm winter hat.

B A special school bag.

C A light down jacket.

D A long wool scarf.

解析：选C。C细节理解题。原文第一句明确提到 “This winter, a special down jacket becomes very popular in China.”，且紧接着补充 “It is very light.”，选项 C “A light down jacket” 与原文的 “special down jacket” 和 “very light” 完全对应。其他选项均与原文不符：A 选项是保暖冬帽，B 选项是特别的书包，D 选项是长羊毛围巾，原文均未提及这些物品成为流行款。故选C。

2.2. Why is the jacket easy to take with you?

A It is very light in weight.

B It has a hood for cover.

C It can be put into a small bag.

D It comes in many colors.

解析：选C。C细节理解题。原文第一段最后一句明确指出 “You can even fold it and put it into a small bag.”，这正是其便于携带的关键原因，与选项 C 表述一致。其他选项均不符合题意：A 选项 “重量很轻”，轻并非便于携带的直接原因，原文未将 “轻” 和 “易携带” 建立此关联；B 选项 “有帽子可遮挡”，帽子的作用与携带便利性无关；D 选项 “有多种颜色”，颜色和携带方便没有关联。故选C。

3.3. How do many people first learn about this jacket?

A From TV programs.

B From online apps.

C From school talks.

D From their parents.

解析：选B。B细节理解题。原文第二段第一句提到 “Many people share photos of this jacket on apps like Xiaohongshu and Douyin.”，小红书和抖音都属于线上应用，与选项 B “From online apps” 相匹配。其他选项均无原文依据：A 选项的电视节目、C 选项的校园讲座、D 选项的父母，原文均未提及这些是人们最初了解到这款羽绒服的途径。故选B。

4.4. Why do students like the jacket?

A It looks beautiful.

B It is very cheap.

C It is warm and cool.

D It has big pockets.

解析：选C。C细节理解题。原文第三段第一句清晰说明 “Students love it because it is both warm and cool in style.”，选项 C “It is warm and cool” 是对原文内容的精准概括。其他选项均不符合原文：A 选项 “看起来漂亮”、B 选项 “很便宜”、D 选项 “有大口袋”，原文中均未提及这些是学生喜欢这款羽绒服的原因。故选C。

5.5. What is the main idea of the passage?

A How to choose a down jacket.

B Why a jacket becomes popular.

C Where to buy a special jacket.

D When people wear down jackets.

解析：选B。B 主旨大意题。全文围绕一款特殊的羽绒服展开，开篇点明它在今年冬天十分流行，随后介绍了它轻便、款式多样、便于收纳的特点，接着说明人们通过线上应用传播它的照片，最后阐述了学生、年轻人、成年人及祖父母等不同人群喜欢它的原因。整体内容都是在解释这款羽绒服为何会流行，与选项 B “Why a jacket becomes popular” 契合。故选B。