您正在看的高中二年级是:Saving the earth。 m.

　　▲ enter (oneself/one’s name )for“报名参加比赛，考试”

　　Jim entered himself for the competition.

　　I wanted to enter my name for the high jump.我想报名参加跳高比赛。

　　How many people entered for the game?

　　I shall enter Tom for the 100-meter race.

　　17. Sun Yao,our monitor and I remembered a programme that a well-known film director had made about the forest.She had shown pictures of a plant that had recently been discovered.我们的班长孙尧和我记起了一位著名的导演所制作的一个有关森林的节目。她给我们看了一种新近发现的植物的图片。

　　▲这两个句子都是含有定语从句的复合句，在第一个句子中，关系代词that引导的定语从句修饰programme，that在从句中作谓语had made的宾语，故可以省去，在第二句中 that 引导的定语从句修饰plant ,that在从句中作主语，故不能省去。

　　▲ programme 在本句中作“节目”解释， programme一词多义，还可作“活动计划，日程，纲领，程序设计”。例：

　　Last night’s programme was a great success.昨晚的节目非常成功。

　　Today’s programme includes a tour of the Statue of Liberty.今晚的活动计划包括游览自由女神像。

　　The hospital building programme has been delayed by lack of money.

　　This university has an excellent English programme.

　　A programmer is a person who prepares a computer programme.

　　18. She had not said,however,where it could be found.She said it was a well-kept secret.We decided to try and find this plant.但她没说可在哪里找到这种植物，并说这是严格保密的，我们决定努力去寻找这种植物。

　　▲discover和find都有“发现”之意，意思很接近，有时可互用。

　　He found/discovered that the whole story was a lie.他发现整个故事是个谎言。

　　He found/discovered that she was excited.

　　We’ve found/discovered oil under the North Sea.

　　【注】但在表示新发现，特别是科学上的发现时，只能用discover。例：

　　Wilhelm Rontgen discovered X rays.

　　19. We had our picnic lunch in the forest next to a fallen tree. After lunch we put some water into a bottle and did tests to see if it was polluted.中午我们在一颗倒下的大树旁野餐。饭后我们把一些水装入瓶子检验水是否被污染。

　　▲ a fallen tree 一颗倒下的树，fallen是过去分词作定语。

　　过去分词作定语的几种情况：

　　▲ 前位修饰：单个的过去分词作定语时放在被修饰的名词之前。

　　The broken glass has been thrown outside.

　　The wounded soldier lay on the ground, unable to move. 那伤员躺在地上，不能动弹。

　　【注】单个的过去分词作定语修饰复合不定代词something,everything,anything,nothing,nobody 等或指示代词those时，要放在这些词之后。

　　He is one of those involved.

　　Is there anything unsolved?有什么问题没解决吗?

　　There’s almost nothing changed since I left the town two years ago.

　　▲后位修饰：分词短语要放在被修饰的名词之后。例：

　　The book written by him is very popular.

　　This is a letter written in blue ink.这是一封用蓝墨水写的信。

　　The girl dressed in red is my daughter.

　　▲过去分词作定语时，及物动词的过去分词可改为动词为被动形式的定语从句。

　　lost time---time which is lost

　　a well-known artist---an artist who is well-known

　　▲ 不及物动词的过去分词作定语时，可改为动词为完成式或动词为表示状态的的定语从句。例：

　　a returned soldier---a soldier who has returned

　　retired workers---workers who have retired

　　20. We were all very interested to see the results. In fact, the water was not at all polluted.In the afternoon, we all went off separately to look for new plants.我们大家都很有兴趣地看了检验结果。实际上这里的水根本没有受到污染，下午我们分头去找新的植物。

　　▲ at all一般用在否定句和疑问句中，强调疑问和否定语气，意为“根本，完全，究竟”。

　　I can’t see anything at all on the Emperor.

　　I had no difficulty at all in answering those questions.我回答那些问题毫无难处。

　　There is nothing interesting at all in his speech.Is he coming to the meeting at all?

　　▲ at all也可以用于条件句，意为“(如果)真的，确实”。例：

　　He will be very happy if he marries her at all.

　　If you are busy at all,we might come to talk to you sometime next week.如果你确实很忙，我们在下周某个时候来跟你说。

　　If one loses his way at night at all,he can recognize his direction by looking at the Big Dipper.

　　▲ at all用于肯定句时表示说话人的某种情绪，也可以起强调作用，意为“真的，竟然”。例：

　　It was with a great effort that he spoke at all.他开口说话竟然那么费劲。

　　He was old and slow and it took him quite some time to find the elephant at all.

　　They were very happy just to have a job at all.

　　21. At five o’clock we started walking back to the entrance to the forest. Suddenly someone said,”Has anyone seen SunYao? He must be lost!”五点钟，我们开始往回走，到森林的入口处去。突然有人说：“有没有谁看见孙尧?他肯定迷路了。”

　　▲ Must在这里表示推测，语气很肯定。例：

　　Tom must be in the reading room.

　　He must be out of his mind to say that.

　　I must look funny in this hat.我戴这顶帽子一顶很滑稽。

　　▲ 如果要推测过去或现在已经发生的事，Must后应跟完成式。例：

　　You must have seen him yesterday.

　　It must have been the coffee that kept me awake.一定是喝了那咖啡，使我睡不着。

　　▲ must be doing/must have been doing用来推测现在正在进行的