Mr. Dawson is an old man with bad temper (脾气). And everyone in town knew it. Kids were afraid to go into his yard to pick apples.

One day, 12-year-old Janet and her friend Amy had to walk past Mr. Dawson's house. When Janet saw him outside, she suggested they crossed the street to the other side. But Amy said they didn't need to.

When Mr. Dawson saw Amy, he smiled and said: "Hello, Amy! I see you have a new friend with you today." Amy smiled back and told him that Janet would stay with her that night. Mr. Dawson looked friendly and gave them each a fresh apple. The girls were glad to get them.

Later, Janet asked Amy: "Everyone says he is the most unwelcome person in town. Why was he kind to us?" Amy explained that when she first walked past his house, she was also afraid of him. But she preteneded there was an invisible (看不见的) smile on his face and then started talking to him.

"An invisible smile?" Janet was puzzled "Yes," answered Amy, "My grandma told me to think so. She says smiles can run around. If we keep smiling at someone, sooner or later he will really smile back."

Try to remember this, and you will find that most people can't refuse your smile.

1.Why were kids afraid to go into Mr. Dawson's yard to pick apples?

____________________

2.What did Janet think of Mr. Dawson after getting an apple from him?

____________________

3.Was Amy afraid of Mr. Dawson when she first walked past his house?

____________________

4.Who did Amy learn "an invisible smile" from?

____________________

5.What does the writer advise us to do?

____________________

There are not many people around who say they like rats(老鼠). When you see one of them, you may want to run in the opposite direction.

There is one man though who has always enjoyed staying with rats, even when he was a young boy. His name is Bart Weetjens and he comes from Belgium in Europe. As he grew up, he learned everything about rats. He knew that they have a very strong sense of smell. He realized that it might be possible to train rats to help solve a problem that troubled some Southeast Asian countries.

Clearing away unexploded bombs and landmines(未爆炸的炸弹和地雷) is a difficult job. Bart began to train rats to look for explosives. Because a rat’s sense of smell is so strong, they are able to smell a thing known as TNT that is used in bombs. And because rats are not heavy, if they place their weight on an unexploded bomb, they will not cause it to explode(爆炸).

Bart chose African Giant Pouched Rats for the job. They are well known for being calm and smart. Training begins when they are about six weeks old, and it lasts for nine months. Once trained, one rat can search up to 200m in 20 minutes. The same area would take a human up to four days. Trained rats are known as Mine Detection Rats, or MDRs, and they have worked successfully in Cambodia since 2015.

1.When Bart Weetjens was a young boy, he enjoyed ____________.

2.As Bart Weetjens grew up, he learned that rats have a very ____________.

3.Rats will not cause an unexploded bomb to explode because they are ____________.

4.It takes ____________ to train African Giant Pouched Rats.

5.MDRs have ____________ since 2015.

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