题目内容
17．Don't be nervous，please sit down and relax．分析 不要紧张，请坐下放松一下．
解答 答案：relax．结合上文推知句意是说不要紧张，请坐下放松一下．这里是祈使句，please后加动词原形，and连接两个对等成分，结合首字母r用动词relax放松，故答案是relax．
点评 表示请求、命令等的句子叫祈使句．它的主语是听话人（you），一般不需要说出来．通常以动词原形开头．祈使句末尾用惊叹号或句号，句子用降调．如：
Open the door，please．请把门打开．
Be quiet，boys．孩子们，安静点．
Hurry up!快点跟上．
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6．What do you do when you are in trouble on a（36）B island？Surely you need to find a way to get in touch （37）A the outside world．Your best chance of doing this is （38）B the attention of a passing plane．
The smoke from a fire can be seen from far away，so it is a good way to attract attention．If the weather is dry，it's （39）C to start a fire．But remember that fires can be very （40）C if they are out of control．Never make a fire unless you're sure that it can't spread．If the ground is dark，（41）A smoke can be seen more easily．Green grass and leaves produce white smoke．
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You can be found more easily in this way．
The smoke from a fire can be seen from far away，so it is a good way to attract attention．If the weather is dry，it's （39）C to start a fire．But remember that fires can be very （40）C if they are out of control．Never make a fire unless you're sure that it can't spread．If the ground is dark，（41）A smoke can be seen more easily．Green grass and leaves produce white smoke．
It's a good idea to make some （42）C，too．For example，"F"means"I need food and water"，"II"（43）C"I need medicine"and"I"for"I am too（44）B hurt to move from here"．These are（45）A symbols．Use large pieces of wood to make them．If you can't find any wood，use earth．
You can be found more easily in this way．
| 36．A．alone | B．lonely | C．lone |
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| 38．A．draw | B．to draw | C．drawing |
| 39．A．hard | B．impossible | C．easy |
| 40．A．safe | B．safely | C．dangerous |
| 41．A．light | B．black | C．blue |
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| 43．A．looks for | B．waits for | C．stands for |
| 44．A．quietly | B．badly | C．slowly |
| 45．A．useful | B．use | C．used． |