外部骨骼很坚硬，但内部骨骼却很柔软 。
9. make blood 制造血液
10. carry sth. through sp.把某物输送到某处
Blood carries nutrients through our bodies.
血液将营养物质输送到我们的全身 。
11. move sth. away 把某物移走
It also help move waste materials away so our bodies can stay healthy.
它（血液）也可以把无用的物质移走，所以我们的身体就可以保持健康 。
12. Calcium makes our bones solid, so we need to get enough of it each day.
因为钙让我们的骨骼坚固，所以我们每天需要获取充足的钙 。
13. Although we get vitamin D from food like fish and eggs, we can also get it from the sun.虽然我们可以从象鱼和鸡蛋这样的食物中获取维生素D，但我们也可以从阳光中获取它 。
14. Try to get a bit of sun every day so you can have healthier bones!
试着每天晒点太阳你就会拥有健康的骨骼 。
15. make…a habit 养成…..的习惯 16. daily activities 日常活动
17. climb stairs 爬楼梯
18. 构词：反义词
hard—soft; inside—outside; sick—healthy; weak--strong
19. because/ so因为 所以
Bones are important because they help us move freely.
骨骼很重要因为它们能帮助我们自由地移动 。
Bones help us move freely, so they are important.
骨骼能帮助我们自由地移动，所以它们很重要 。
20. Although/ but 虽让，但是
Bones are hard on the outside, but they’re soft on the inside.
Although bones are hard on the outside, they are soft on the inside.
21. before lunchtime 午餐前
22. Although I’m very busy at school, I try to exercise three times a week.
虽然在学校我非常忙，但是我努力一周锻炼3次
Communication Workshop
1. do a survey at school 在学校做个调查
2. good/ bad habits 好习惯、坏习惯
3. I’m fast so I don’t waste water. 我很快所以不浪费水
4. When you exercise, it makes your bones stronger.
当你锻炼时，它让你的骨骼更强壮 。
5. play ping-pong 打乒乓球
6. I have a lot of good habits, but I need to eat less junk food and exercise more. 我有许多好习惯，但我需要少吃垃圾食品、多做锻炼 。
7. take fast showers. 快速地淋浴8. in the blanks在空格中
Unit 5Helping
Getting Ready
1.protect the environment保护环境
2.recycle bottles/ plastic/ paper回收瓶子，塑料纸 。
3.save electricity/ water节电/节水
4.turn off lights / the TV关灯，关电视
Lesson 13Helping Your Community
1.Make a reply to requests对要求做一个回复
2.on the notice board在通知板上
3.do volunteer work做志愿者的工作
4.similar/different相似，不同
5.It seems that it dirtier than I thought.看起来比我们想象的更脏
6.It’s really a shame.真的很遗憾
7.There is some metal here and some old cans too.
这里也有一些金属和一些旧的
8.You have a rope with you, right?你有一条绳子，对吗
9.pieces of wood几块木头
10.Just a second.稍等
11. be finished完成了的We are finally finished.我们最终完成了
12. litter on the beach在海滩上扔东西
I think we really need to let people know they shouldn’t litter on the beach.我认为我们真的需要让人们知道他们不应该在海滩上扔东西
13. put up a notice张贴一个通知
14. complete a form填写一个表格
15. read sth. to sb.给某人读…….
16. beach clean-up海滩清扫（名词短语） clean up the beach
17. two cans of soup两罐汤
18. I have an exam tomorrow, so I can’t play basketball with you.
明天我有一场考试，因此我不能和你一起打篮球 。
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