与逻辑主语scientists之间是主动关系。

　　10．what　"what they saw"是宾语从句，what在从句中作saw的宾语。

　　Ⅱ.短文改错

　　Man should save the earth. In fact, the earth doesn't need to saved. Instead, it is man which needs saving. However we damage the earth, it is all a same. Even if all the living things died out, the earth would still turn around normal. Millions of years later, new living things would appear on the earth. It is said that the living things on earth have died out for much times.

　　So we should protect from the earth, keeping a proper living environment for humans to last. If we continued damaging the earth, the condition on earth are unfit for us. Look for another proper planet doesn't make sense. Man is certainly to disappear in that case!

　　答案：第二句：saved前加be

　　第三句：which→that/who

　　第四句：a→the

　　第五句：normal→normally

　　第七句：much→many

　　第八句：去掉from

　　第九句：continued→continue; condition→conditions

　　第十句：Look→Looking

　　第十一句：certainly→certain

　　Ⅲ.书面表达

　　假定你是李华，最近你收到好友王林的电子邮件，他说在英语学习上用功不少，但是效果不好，他想放弃英语学习。请你根据以下内容回复王林，劝他不要放弃英语学习。

　　1．要对自己有信心；

　　2．与英语学习好的同学交朋友；

　　3．进步时奖励自己。

　　注意：1.词数100左右；

　　2．可以适当增加细节，以使行文连贯。

　　参考范文：

　　Dear Wang Lin，

　　I'm sorry to learn that you don't do well in English. I'd like to give you my advice on learning English.

First of all, you should have confidence in yourself, which is very important to English learning. Secondly, you'd better make friends with the students who are good at English and