①Henry often recycles water to clean his room and water the flowers. {#blank#}1{#/blank#}

②Daphne always turns off the lights and the computer as soon as she leaves her office. {#blank#}2{#/blank#}

③Mr White sometimes goes to work by bus or on foot instead of driving car. {#blank#}3{#/blank#}

④Li Lei usually uses QQ or e-mail to talk with his friends, he doesn't use paper letters. {#blank#}4{#/blank#}

⑤Miss Zhang doesn't wear fur(皮) clothes and she decides to eat less meat. {#blank#}5{#/blank#}

    If you go into the forest with friends, stay with them. {#blank#}1{#/blank#}If you get lost, this is what you should do. Sit down and stay where you are. {#blank#}2{#/blank#}You can help them find you by staying in one place. There is another way to help your friends or other people to find you. You can shout or whistle (吹口哨) three times. Stop. Then shout or whistle three times again. {#blank#}3{#/blank#}

    Keep up shouting or whistling. Always three times together. When people hear you, they will know that you are not just making a noise for fun.{#blank#}4{#/blank#}They will give you two shouts or two whistles. When a signal is given twice, it is an answer to a call for help.

    If you don't think that you will get help before night comes, try to make a little house with branches(树枝). {#blank#}5{#/blank#}

    When you need some water, you have to leave your little branch house to look for it. Don't just walk away. Pick off small branches and drop them as you walk in order to go back again easily. When you are lost, the most important thing to do is to stay in one place.

    People burn coal, gas and oil to get energy But there are problems with these fuels (燃料). (A)________, these fuels cause pollution. Pollution makes the air and water unsafe for humans. Secondly, these fuels will not last forever. One day, we will run out of these fuels.

    Scientists are looking for new kinds of energy. One is heat from the Earth. We know that (B)地球中央非常热. We cannot reach the center of the Earth, but in some places the heat from the Earth's center comes to the surface of the Earth. Perhaps you know about some of these places One place is volcanoes (火山). It is very dangerous to go near an active volcano, (C) _______ we cannot use the energy from this.

    Another kind of heat from the Earth is hot springs (温泉). In these places, hot water comes to the surface of the Earth. If this water is near a town, the hot water can be sent in pipes (管道) directly to people's houses to heat them .In Iceland, this is a common way to heat houses.

    (D)In Australia, scientists are looking for ways to make energy using hot rocks under the surface of the Earth. They want to pump (抽水)water onto the hot rocks .When the water hits the rocks, it makes stream(蒸汽). The steam is piped to power stations where (E) it is used to make electricity. The electricity can then be sent all over the country.

    It seems like every time you turn around, someone is talking about dieting. During gym class your best friend always complains about her "big" hips and how she's going on a diet to get rid of them. This focus on weight and dieting may leave you wondering whether you need to go on a diet yourself.

    The truth is that not all teens who diet actually need to lose weight. Because teens are still growing, dieting can sometimes be harmful to their developing bodies. Other teens may mistakenly think that in order to be in top form for their chosen sport, they need to be as thin as possible.

    The best person to see when you have a question about dieting is your doctor. Your doctor can help you determine what is a healthy weight for your body size and shape. He or she can help you decide whether you need to be on a diet at all.

    There are healthy and unhealthy ways to lose weight, and in the long run you are better off taking the healthy route. If you and your doctor do decide that going on a diet is the right thing for you, he or she can help you come up with a plan.

    Even without seeing your doctor, you can make smart food choices that will keep you healthy. Instead of chewing (嚼) down on chips when you get home from school, try a piece of fruit or some vegetables.

    Simple low—fat substitutions (替代品) can make a huge difference in your calorie intake as well. For example, skim or low—fat milk or water are better drink choices when you're thirsty—soda and fruit drinks are loaded with calories and sugar and short on nutrition (营养).

    Another thing to keep in mind is that exercise can help you feel and look better. Regular exercise tones your muscles while you burn calories and fat, and it makes you look slimmer. Remember that toning up takes time. Running the mile in gym class once a year won't make a difference in overall weight loss, so start slowly and work up to it.

    Whether you go on a diet or not, exercising and healthy eating are excellent ways to keep your body in great shape Cutting down on the time you spend in front of the computer or TV can help you boost your activity level and may even help you snack less. And research shows that people who exercise regularly are more likely to maintain their new weight if they've lost weight. So, get moving and keep your health on track!