基础题
阅读以下新闻片段，回答问题。
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Headline: City Library Extends Hours
> The Central City Library announced today that it will remain open until 10 PM on weekdays starting next month. This decision follows a survey showing that 70% of visitors requested later hours. "We want to serve our community better," said Director Jane Smith.
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Question: What is the main reason for the library's new schedule?
> A. The director wants to show off.
> B. Visitors requested later hours.
> C. The library has more staff.
> D. It is a holiday.
变式
阅读以下说明文片段，回答问题。
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Topic: The Water Cycle
> Water moves continuously between the Earth's surface and the atmosphere. First, the sun heats water in oceans and lakes, causing it to evaporate. This water vapor rises and cools, forming clouds. When the clouds become heavy, the water falls back to the Earth as rain or snow. This process repeats endlessly.
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Question: According to the text, what happens immediately after water vapor rises?
> A. It forms clouds.
> B. It falls as rain.
> C. It heats up.
> D. It evaporates.
1. 定位体裁：识别为新闻报道，核心信息通常在首段。
2. 提取关键句：首段第二句 "This decision follows a survey showing that 70% of visitors requested later hours."（这一决定紧随一项调查显示70%的访客要求延长开放时间之后）。
3. 排除干扰：第三句是引用（Director Jane Smith的话），属于补充说明，非根本原因；A、C、D在文中无依据。
4. 得出结论：原因是访客要求，选 B。