Finding the cause of a leak
Put the paragraphs in a logical order.
使用上下按钮调整顺序；键盘也可操作。
- 1
After tightening that connection, he ran the tap again and found that the area stayed dry.
- 2
To find the source, he dried the area and watched while the tap was running.
- 3
A small drop then appeared where one pipe joined another.
- 4
A resident noticed water collecting under the kitchen sink.
完成后查看：参考答案、中文解析与原文
建议先独立作答。这里提供本站参考内容；提交按钮仍会保存练习并核对客观题。
参考答案
1. A resident noticed water collecting under the kitchen sink. 2. To find the source, he dried the area and watched while the tap was running. 3. A small drop then appeared where one pipe joined another. 4. After tightening that connection, he ran the tap again and found that the area stayed dry.
中文解析
问题 → 定位方法 → 具体发现 → 修复验证。不能一见 After 就放末尾而不检查 that connection 的先行词。
逐项分析：依据与易错点
起点：先建立主题
water under sink 建立待解决问题。
衔接 1 → 2
the source 指积水来源，先擦干再观察。
衔接 2 → 3
then 承接观察过程，发现连接处滴水。
衔接 3 → 4
that connection 指上一句管接头；再次放水验证修复。
AI 辅助原创练习 · 经站主人工核对（2026-10-28）。不是 Pearson 官方真题或官方评分。