阅读短文，根据短文内容，简要回答下列问题。

Recently, a father called Daming and his son Dongshun’s photos became hot all over China. In the photos, while they are working on the boat on Dongting Lake, lots of fish are jumping into the fish bin(鱼舱).

Dongting Lake is the second freshwater(淡水) lake in China, it’s home to nearly 400 kinds of fishes. But in the past, people threw litter and factories put waste water into the lake. Even worse, a large number of fish were caught by fishermen. Because of pollution and overfishing (过度捕捞), the Yangtze River was in great danger. For example, the Chinese paddlefish(中华白鲟) disappeared 2 years ago. Daming used to make a living by fishing near Dongting Lake. However, life was gradually becoming difficult for Daming and other fishermen. The more times they went to fish, the fewer fish they could get.

In January, 2020, the government called for a 10-year fishing ban(禁渔令), covering 332 conservation areas(保护区) in the Yangtze River. Dongshun has worked with his father as a lake ranger (巡湖员) for almost 3 years. This job helps him understand how important it is to protect Dongting Lake. “I think this job is meaningful.” he said, “As the wind is blowing gently, fish are swimming happily. What a beautiful scene! The fishing ban will lead Dongting Lake to a better future.”

（1）Why was the Yangtze River in great danger in the past from the passage?

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（2）How did Daming use to make a living?

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（3）What did the government call for in January, 2020?

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（4）What is Dongshun’s job now?

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（5）Does Dongshun know the importance of protecting Dongting Lake?

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