Miss Kate taught physics in a New York school. Last month she was explaining to one of her classes about sound, and she decided to test them to see how well they had understood her explanation. She said to them, "Now, I have a brother in Los Angeles. If I was calling him on the phone, and at the same time you were 80 meters away, and were listening to me from across the street, which of you would hear what I said earlier, my brother or you and for what reason?"

A boy at once answered, " Your brother, Miss Kate, because electricity travels faster than sound waves(声波).

"That's very good." Miss Kate said, but then Jenny said, "I don't agree. Your brother would hear you earlier because it is 11 o'clock here, it's only eight o'clock in Los Angeles."

    Exercising is a good way to keep fit. However, many people do not know how to exercise well. Here are some tips.

    First, you should warm up. It is important to warm up before you exercise. You need to stretch your legs, arms, back and neck before you do any difficult activities like running.

    Second, you should find good places to exercise. You do not need to spend a lot of money. You can run or do sports in a park or in your school gym. You don't need to buy exercise equipment for your home. Just get your body moving. 

    Third, don't work too hard. Choose a sport that you enjoy and then your exercise will be fun instead of work. Also, you only need to exercise a few times each week. If you exercise 30 minutes each time, you will stay healthy.

    Fourth, drink enough water. It is important to drink water when you exercise. Your body needs the water for energy and for keeping cool.

    Finally, you must be careful! If you hurt yourself while you are exercising, rest until you feel better. Exercising when you are hurt is bad for your health.

    The world is an interesting place. Different people like different things. Some people like loud music. Other people don't.{#blank#}1{#/blank#}

    Many people like sports, but they do not all like the same sports. In some countries, cricket (板球运动) is a very popular sport, in others it is not popular at all. No one plays it or watches it on TV. However, most people like soccer. The World Cup is very popular.{#blank#}2{#/blank#}

    Different people like different foods. Some people do not like meat.{#blank#}3{#/blank#} Some people do not like potatoes or bread. They prefer rice.

    {#blank#}4{#/blank#} Most people have their favorite colors. Some people like bright colors. Others prefer pale colors.

    Many people like traveling. Different people like different places. Some people like to go to the country. They like the fresh air. Some people like to go to the cities. Because they like shopping.{#blank#}5{#/blank#}

    What do you like? Have you got an idea?

A. They like soft music.

B. Not everyone likes the same color.

C. Millions of people watch the games on TV.

D. Different people like different kinds of pets.

E. They eat fruit and vegetables most of the time.

F. So they don't raise pigs in their countries.

G. Some other people enjoy beautiful places like the mountains or beaches.

Try to help your dog relax

    It's a Saturday morning. You rush through breakfast, walk the dog, and then get to soccer practice on time. A few hours later, you return home, only to find that the dog has made your bedroom untidy.  {#blank#}1{#/blank#} Your favorite sports shoes are in poor condition.

    Before you get angry, stop and think. Your dog wasn't misbehaving (行为不端) just for the fun of it. {#blank#}2{#/blank#} Some dogs just feel nervous when left alone. It's called separation anxiety (分离焦虑).

    Think of it this way: Dogs can't ask where you're going or when you'll be back. They can't call you on the phone. {#blank#}3{#/blank#} Since you're not there, they need to find you. Dogs may suddenly develop separation anxiety. But with practice and patience (耐心), you can teach your dog to be comfortable being left alone.

    Put on your jacket, and then sit back down. Open and close the door, and then sit down. After a while, walk out the door for 10 seconds, then 20, then a minute and so on. {#blank#}4{#/blank#}

    Besides, you can also try the following ways:

    Teach your dog a word or action that you use every time you leave, which tells your dog you'll be back.

    Help comfort (安慰) your dog by leaving a piece of clothing that smells like you.

    Before you leave, give your dog a toy. {#blank#}5{#/blank#} 

How to pick a great book to read

    The world is full of great books just waiting to be read. How can you pick one you'll really like.

    Here are some tips:

    What makes you happy?

    {#blank#}1{#/blank#}Are you really into dinosaurs or dogs or a film star? Are there a few careers you're interested in? You can find books about almost anything you like, and you're more likely to enjoy reading a book if you're already interested in its subject.

Fact and fiction?

    Some books are entirely made up and imagined Those are called fiction books{#blank#}2{#/blank#} Non-fiction books tell stories using facts—but that doesn't mean they're boring. Non-fiction books can bring everything to life.From the first trip to the moon to what it's like to explore the deepest oceans. Try both fiction and non-fiction books to see which you like better.

    {#blank#}3{#/blank#}What was your mother's favorite book when she was your age or your dads? Ask them and give it a read. Then you can talk about what they liked about it and share your thoughts. It's a fun way to get to know your family a little better, and to find a book you'll enjoy!

    Ask an expert.

    Your local library is a great place to find books that you'll love, and you don't have to search them by yourself.

    {#blank#}4{#/blank#}Your librarian can help you find other books that you're sure to love.Your teacher is another good person to ask.

Organize a book swap.(交换)

    Why not get some friends together and trade favorite books? It's always fun to see what your friends are reading.{#blank#}5{#/blank#}You also can look for book swaps in your area.

    Mr Brown was at the theatre. He had got his ticket at the moment, so he had not been able to choose tis seat. He now found that he was in the middle of a group of American ladies, some of them middle-aged and some of them quite old. They clearly all knew each other well, as before the curtain went up on the play they bad come to see, they all talked and joked a lot together.

    The lady sitting on Mr Brown's left, who was about sixty years old, seemed to be the happiest and the most amusing of the American group, and after the first act(幕)of the play, she apologized to him for the noisiness of her friends. He answered that he was very glad to see American ladies so obviously enjoying their visit to England, and so they had a friendly talk. Mr Brown's neighbour explained what they were doing there.

    "You know, I have known these ladies all my life, "she said. " We all grew up together back in our hometown in the United States. They have all lost their husbands, and call themselves the Merry Widows(寡妇). It is a sort of club, you know. They go abroad every summer for a month or two and have a lot of fun. They always go everywhere together. I have wanted to join their club for a long time, but I didn't qualify(具备……的资格)for membership until the spring of this year. "