Your brain controls everything you do．It makes it possible for you to think，learn，create and feel；to blink （眨眼）and breathe and for your heart to beat-this fantastic control center is you brain．It is so amazing that a famous scientist once called it"the most complex （复杂）thing we have yet discovered in our universe"．
2． the sun was shining，it wasn't very warm．（ ）
| A． | Because | B． | If | C． | Although | D． | Since |
1．--What about going to Jingpo Lake for a trip next weekend？
--Ok．But I'm not sure _____ it will rain．（ ）
--Ok．But I'm not sure _____ it will rain．（ ）
| A． | whether | B． | where | C． | why |
20．Adventure（冒险）travel is a great way to see the world．It is a kind of tourism，often to far places．Adventure travel often includes adventure activities such as mountain climbing，rock climbing and so on．
These activities may bring risks to your health and safety．But they can be fun exciting and safe if you prepare for your trip and follow safety rules．
Make an appointment（预约）with a doctor about a month before your adventure travel．Be sure to talk to the doctor about your planned adventure activities．He or she may give you some special advice．
Take a first-aid course two weeks before your adventure travel．Consider taking a first-aid box with you．If you get hurt during your trip，you can give yourself some simple medical care
You'd better buy travel insurance（保险）before you set off．
During your adventure travel，you should also follow some rules．The following are some of them．
Wear protective clothes when doing adventure activities．
Always follow safety advice from your guides．
If you go somewhere hot，be sure to take sunglasses with you．They can protect you against the sun．
Adventure travel
These activities may bring risks to your health and safety．But they can be fun exciting and safe if you prepare for your trip and follow safety rules．
Make an appointment（预约）with a doctor about a month before your adventure travel．Be sure to talk to the doctor about your planned adventure activities．He or she may give you some special advice．
Take a first-aid course two weeks before your adventure travel．Consider taking a first-aid box with you．If you get hurt during your trip，you can give yourself some simple medical care
You'd better buy travel insurance（保险）before you set off．
During your adventure travel，you should also follow some rules．The following are some of them．
Wear protective clothes when doing adventure activities．
Always follow safety advice from your guides．
If you go somewhere hot，be sure to take sunglasses with you．They can protect you against the sun．
Adventure travel
| Meaning | a great way to see the world a kind of tourism，often to（56） far places | |
| Examples | Mountain climbing （57）Rocking climbing | |
| Influence | Advantages | （58）Fun、exciting and safe |
| Disadvantages | Risks to your health and safety | |
| （59）Advice | Before travel | Talking to the doctor Taking a first-aid course Buying travel insurance |
| During travel | Wearing protective clothes （60）Following safety advice Taking sunglasses | |
19．It might be a boy's room_____ the clothes look like boys'clothes．（ ）
| A． | when | B． | because | C． | but |
18．--I'm afraid that I can't do it well．
--You should believe in yourself．You won't know what you can do _____ you try it．（ ）
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--You should believe in yourself．You won't know what you can do _____ you try it．（ ）
| A． | until | B． | if | C． | while | D． | although |