When we are talking about animals in China, the most precious (珍贵的) animal we would think of is the panda. In fact, we have one kind of bird as precious as the panda,1many people don't know much about it. The bird is called crested ibis (朱鹮) . It is as2as snow with a red face and looks very beautiful. It is also in danger like the panda.

Crested ibises3in tall trees by small rivers or rice fields. They look for small fish and4small animals for food. About one hundred years ago,5crested ibises lived in China, Russia and Japan. Later, as they lost their homes,6them was getting smaller and smaller. Between 1965 and 1980, people didn't see any of them living in the wild. Luckily, on May 23, 1981, scientists7seven of them in the south of Shanxi Province. 8protect crested ibises in the wild, the Chinese government is setting up nature parks and developing other plans. Now scientists are doing a lot of research to help them to9more babies. Today there are about 1,500 crested ibises living in the wild. Zoos and research centres10after about 500 crested ibises.

Today, many students are always stressed out. They are often too busy to think{#blank#}1{#/blank#} their diets and exercise. Healthy eating, along with regular(定期的) exercise {#blank#}2{#/blank#} (keep) you healthy. Do you think it is the only way to keep us in {#blank#}3{#/blank#}(healthy)?

As we know, it is important to give your body the energy it needs. Teenage girls {#blank#}4{#/blank#} (need) about 2,200 calories(卡路里) a day and boys need a bit more. {#blank#}5{#/blank#} (fiftieth) percent of your calories should come from rice, bread, {#blank#}6{#/blank#}(vegetable) and fruit. You also need to d{#blank#}7{#/blank#} a lot of water, six to eight glasses a day. Enough water will improve your skin and give you healthy hair.

Exercise can help to make you look good, feel good {#blank#}8{#/blank#} be healthy. Scientists suggest that teenagers should spend at{#blank#}9{#/blank#}(little) 30 minutes exercising every day.

Exercise can make you feel {#blank#}10{#/blank#} (relax)and energetic. It can even help you sleep better at night.

Let's eat healthily and take more exercise.

    Laughter is natural for people. We start to laugh at about four months of age. We start to laugh even1 we start to speak.

    Laughter connects us with others. We laugh more when we are with other people. It's difficult to pretend to laugh. Laughter is2. When people pretend to laugh, most people know it's not real.

   When do people laugh?

    Only 10 to 20 percent of laughter is about something3. Most laughter is about being friendly with other people. Most laughter says, "I don't want to4 with you. I want to be friendly with you." This kind of laughter brings people together.

    We often laugh when we feel nervous. In movies, there is often a joke at an exciting moment when everyone feels nervous. It is usually a(n)5 joke, but we laugh a lot. Our laughter helps us6.

   Why doesn't everyone laugh at the same joke?

    Not everyone has the same sense of7. Some people think a joke is funny, but other people don't think so. People have different ideas about what is funny.

    Our idea of what is funny changes with8. For young children, the world is new. They are interested in many things, so they laugh9. Teenagers often laugh to protect themselves. Adults laugh at themselves and other people with similar problems. They laugh at things that give them stress. Our10 for laughter change gradually.

It's 8：00 am. A new term(学期)begins. This is the first class. 

Betty's new teacher comes into the classroom. She is a nice girl. "Good morning, boys and girls. Welcome to Class 3, Grade 7. I'm your English teacher—Helen Miller. You can call me Ms Miller or Helen. I'm from London and my phone number is 8336 001. I hope you like me. " 

"I like you, Helen，"one girl says. "My name's Kate King. I'm from Oxford. My phone number is 8975 002. " Then Kate gives a red flower to Ms Miller. 

"Helen, I love you，"one boy says. "I'm Dave Black from Cambridge. My phone number is 8790 041. "And Dave gives a red flower to Ms Miller, too. 

After that, two girls stand up and say, "We like you, too, Ms Miller. " Helen is surprised (惊讶的) to see them. They look the same. "We're twins from Liverpool，"one girl says. "I'm Lucy Brown and she is Lily Brown. Our phone number is 8790 032. " Then Ms Miller gets two red flowers again…