1. What's the news? - It is bad. - слово news - новость, новости - всегда в ед. числе.
2. My friend has earned a lot of money. He gave it to his mother. слово money - деньги - всегда в ед. числе.
3. This summer I learned a lot about people. This knowledge helps me make friends. - слово knowledge - знания - всегда в ед. числе.
4. My grandfather has a good library. I really want to get access to all this information. - слово information -информация- всегда в ед. числе.
5. Don't follow his advice. It is never good. слово advice - совет (советы) всегда в ед. числе.