A young man born in the 1990s named Lin Yu has won wide praise online for cleaning up the dirty ditches (沟渠) in his village. His simple but touching videos have been viewed more than 3 million times, surprising many people.

When Lin Yu returned to his hometown, the rainy season came. The village ditches had been left uncared for years. They were full of thick mud and rubbish, so rainwater could not run away properly. As a result, the fields nearby were flooded, and villagers had to walk through muddy pools. It was especially dangerous for the elderly and children, who might easily fall down.

Seeing the trouble of the villagers, Lin Yu decided to take action. He had learned some basic knowledge about water projects, so he offered to clean the ditches. At first, many villagers doubted him. They thought he had lived in the city for too long to do such hard work. However, Lin Yu proved them wrong with his action.

The work was really tiring. The ditches were narrow and slippery, with mud up to his knees. In hot summers, he was wet all over with sweat and mud. In cold winters, his hands turned red and even grew blisters (水疱). Lin Yu started working before 6 o’clock every morning to avoid influencing villagers’ daily life. He kept working until evening, spending at least eight hours each day. He never complained or showed off, but kept digging and cleaning the ditches patiently.

1.1.What did Lin Yu do in the village?

A He showed beautiful village life.

B He cleaned up the dirty ditches.

C He taught useful farming skills.

D He made people laugh a lot.

解析：选B。B细节理解题。根据文章第一段第一句 "A young man ... named Lin Yu has won wide praise online for cleaning up the dirty ditches (沟渠) in his village." 可知，林宇在村里清理了肮脏的沟渠，这是文中直接给出的具体事实，故选B。A、C、D三项内容在文中均未提及，属于无中生有。故选B。

2.2. What problem did the dirty ditches cause?

A Fields became flooded.

B Roads were very dirty.

C Crops were cut down.

D Villagers fell ill easily.

解析：选A。A细节理解题。文章第二段明确指出 "As a result, the fields nearby were flooded"，说明雨水无法排出导致田地淹水，故选A。B项“道路很脏”和D项“村民容易生病”文中未提及；C项“庄稼被砍倒”与文意不符。故选A。

3.3. How did villagers feel about Lin Yu at first?

A They were thankful.

B They were doubtful.

C They were friendly.

D They were excited.

解析：选B。B 细节理解题。文章第三段提到 “At first, many villagers doubted him.”村民一开始怀疑这个从城市回来的年轻人吃不了苦，因此他们对林宇的态度是“怀疑的”（doubtful），故选B。A、C、D三项与文中的doubted情感色彩相反。故选 B。

4.4. Why did Lin Yu work so early in the morning?

A To miss the hot sun.

B To finish work fast.

C To avoid troubling others.

D To clean more ditches.

解析：选C。C细节理解题。文章第四段明确写道 "Lin Yu started working before 6 o’clock every morning to avoid influencing villagers’ daily life." 他早起干活是为了不影响村民的正常生活，即避免打扰他人，故选C。A项“避开烈日”虽在情理之中，但文中未作为早起原因给出；B项“尽快完工”和D项“清理更多沟渠”均与原文意图不符。故选C。

5.5. What is the best title for this passage?

A Life in a Beautiful Countryside.

B The Secret of Making Hot Videos.

C How to Build Village Drainage (排水).

D A Young Man’s Quiet Devotion.

解析：选D。D 主旨大意题。全文讲述了林宇默默回到家乡，不计回报、坚持清理沟渠的故事，突出其默默奉献（quiet devotion）的精神品质。选项A侧重描写乡村风景，与内容无关；选项B强调视频走红秘诀，仅提及视频走红的结果，非核心主旨；选项C“如何修建排水系统”过于技术化，文章并未传授具体建造方法。因此D项最能概括全文主旨。故选D。