[填空题]Tourists have learnt to make investigations about tour operators before using them.

[单项选择]How had the man learnt about the museum
A. He took a tour of the city.
B. He worked there as a guide.
C. He wrote an article about it.
D. He read about it.

[简答题]Describe one important thing you have ever learnt in your childhood. Include reasons and details to support your response.

[填空题]the fact that some companies have learnt from the mistakes of others

[简答题]

In the past 20 years, scientists have learnt a great deal about sleep and dreams. They have covered , for example, that sleep and dreams affect the way people feel. A good night’s sleep generally make a person happier in the morning. Dreams also have strong effect on a person’s moods. However, who appears in a dream is more important than what happens. Every person has a special dream character. If the special character appears in dreams, people are happier after sleeping. If there are many people in one’s dream, this has a good effect a person will wake up happier.
A person’s moods affect his or her performance through the day. The level of one’s moods rises and falls during the day. The less sleepy people are, the better they perform, and usually they are more friendly and more clear thinking. Some day scientists hope to be able to control the way people feel and perform.

What is the main topic of this talk