13．A Happy Hero
　　One day, Linda and Jenny were sitting at Linda's house. They were working very hard.
　　They were working on a (1)       project about weather. Linda was a hard worker like Jenny, so the two girls were (2)       to have each other as partners. They were reading about rain and were amazed to (3)       Hawaii is the world's wettest (最潮湿的) place!
　　The girls were enjoying the fun facts (事实) when all of a sudden, Linda (4)       Jenny was choking (窒息). Jenny was chewing (咀嚼) on a pen cap and accidentally swallowed (吞下) it!
　　Jenny started pointing to her (5)      . Linda asked her if (是否) she was choking. When Jenny nodded (点头) to say yes, Linda (6)       stood up and did the Heimlich maneuver (海姆利克氏急救法) to try to help Jenny stop choking.
　　Linda was afraid of (7)       her friend, so the first time she tried the Heimlich maneuver, she did not do it very hard.
　　After trying it a second time, the pen cap flew out of Jenny's mouth!Jenny was very grateful (感谢的) to Linda. She was scared when she realised she swallowed the pen cap and could not breathe. Linda was very brave to try to (8)       her friend. Both girls would never forget this science project!

15．　　My friend Jack and I were doing maths homework while his grandma was baking (烤) cookies.
　　"We are lucky to have enough food. Some people don't have that." Jack said. "Maybe we can do something to help," I said. "But it's a big problem."
　　After some discussion, we decided to volunteer at a soup kitchen the next week. Jack and I never did anything like this before, so we felt nervous.
　　On that day, Jack's grandma served (提供) soup. Jack was in charge of (负责) the fruit salad, and I served mashed potatoes (土豆泥) .
　　A man put his plate (盘子) in front of me. "Those potatoes look delicious." he said. "They do smell good." I put a scoopful (一勺子) onto his plate and asked him, "What do you get when an elephant crosses a potato?"
　　"Um, I am not sure."
　　"Mashed potatoes."
　　"That's funny!" he laughed. "I am David. You sure brightened up (使变得明亮)my day, young man. Thank you."
　　On the way home, Jack, his grandma and I shared stories about the great people and the interesting things that day. We don't need a lot of money to make a difference. We can donate (捐赠) our time, and we would like to go back and help again sometime.

16．　　All mammals (哺乳动物) sleep. Some stand up when they are sleeping and others lie down. All people need to sleep too. No one really knows why we sleep, but we know it is important for us to get enough sleep.
　　It looks as if nothing is happening when we sleep, but our bodies and brains are actually very busy. Our bodies are busy building new cells (细胞). We need them to grow. Without sleep, children do not grow and may get sick more often. During sleep, our brains are busy putting our ideas in order and then storing them in our memories. Without sleep, it is harder to remember things.
　　Sleep is important. When people do not get enough sleep, they do things more slowly, get sad easily and make mistakes.
　　We all need sleep, but how much sleep we need changes as we grow up. A newborn baby sleeps from sixteen to twenty hours a day, but as people get older, they need less sleep. The average ten-year-old children sleep ten hours a day. Most adults (成人) spend about eight hours a day sleeping. Some older people only spend about six hours a day sleeping.
　　We may not know why we sleep, but we know we look better and feel better after a good night's sleep because our bodies and our brains are ready for a new day.

17．　　Do you like to learn a foreign (外国的) language? Do you think English is easy to learn? Foreigners say learning Chinese is not easy for them. We use a different character for each word. For foreigners, it is hard to memories them. They find reading Chinese poems (诗), writing Chinese characters and understanding the same word in different sentences are the most difficult.
　　However, Chinese is more popular around the world today. The long history and colorful culture of China attract (吸引) many foreigners to learn Chinese. China is developing (发展) fast. It is staying ahead in many fields and is playing its role in the world. Chinese is becoming a global (全球的) language.
　　Many countries have Chinese classes in their schools. For example, in the UK, students chose between Spanish (西班牙语), Latin, French and other foreign language courses (课程) in the past. But now schools encourage their students to study Chinese. 1031 people took Chinese language exams in 2001, and the number was 2062 last year, while 2561 people chose Spanish.
　　Just as the foreigners do, we also learn foreign languages. Different languages carry different cultures (文化). So learning a foreign language is necessary (必要的). When we learn a foreign language, we not only have a useful tool of communicating but also experience a new culture. What's more important, learning a foreign language well will help us tell our own stories to the world.

18．Wonderful Bones
　　Do you know how many bones there are in your body? When you were a baby, you had about 330 bones, and now you have just over 200 bones. It's because some bones join together as you grow.
　　Many Uses
　　Many bones protect your body. For example, the skull (头盖骨) surrounds your brain and protects it from harm. The ribs (助骨) protect your heart and lungs (肺).
　　Other bones are used to support the body. Your hands and feet have more than half of the bones in your body!
　　Longest Bone
　　The longest bone in your body is in your leg. It is the femur (股骨), and it goes from your hip (臀部) to your knee (膝盖). It is a very important bone because it carries all of your weight and helps you move from place to place.
　　Smallest Bone
　　Would you believe the smallest bone in your body is in your ear? It is the stirrup (镫骨). It is about the size of a grain (粒) of rice. When sound waves (波) come into your ear, the stirrup shakes back and forth. It allows the sound waves to reach your brain.
　　The bones in our bodies are big, small, and in-between sized. They help us grow, protect us, and allow us to move. They really are wonderful.

1. How many bones does a baby have?
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2. What do the ribs protect?
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3. What is the longest bone in your body?
__________________________________________________
4. Where is the smallest bone in your body?
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5. Why are bones wonderful?
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19．题目①
假如你是李华, 你和朋友准备去阳光沙滩 (Sunny Beach)做志愿者, 你打算邀请你们学校的外教Tom参加．请你用英语写一封郎件, 告诉他志愿者活动的时间和地点, 活动内容, 以及需要准备什么．
提示词语:Sunny Beach, clean, glove, bag, drinks
提示问题:When and where are you going to do the volunteer work?
What are you going to do?
What do you advise Tom to prepare for the volunteer work?
Dear Tom,
How is it going?
I'm writing to invite you to our volunteer work.
I'm looking forward to your early reply.
Yours,
Li Hua