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1. If（x＋y）2＝100 and （x－y）2＝16,what is the value of xy?

10. The coach chose Amanda to run the final lap of the relay, since her time was better than either Gwen or Christine.

关于主题句的主语问题

回头想来，这套丛书之所以受到各位的青睐，我想最主要的原因可能还是其以试题分析见长的特点。

　　Our coming made him happy.

　　我们的到来使他很高兴。（coming 起名词作用）

如前文所述，只要句中出现两个女性人物，那么she或her的指代就可能有问题，即使这个she的指代对象在我们看来是很明确的。所以A、B、D、E都存在代词模糊指代的问题。

【写作语言分析】

本文作者举的例子是在南北战争时期，在解放黑奴运动中做出了杰出贡献的两位先驱一位是在1931年创办激进废奴主义杂志《解放者》，

We were talking about the Civil War and the abolition of slavery. I was well prepared, of course. I knew all about the Battle of Antietam and the Battle of Bentonville, I could find the battlefields on a map and tell you how many people had died. I raised my hand to give an answer and Mr. Blumgarden called on me. After I had answered, he asked me another question. But this was an unusual question. He asked me what I thoughtsoldiers on both sides thought about what they were fighting for. After that other people chimed in. And the class began to discuss the beliefs of both sides, the reason they went to war, and what might have happened if the other side had won. And I kept raising my hand, not to show how much I knew but, for once, because I was really interested.

对刚才这个问题，考生要明确自己的观点到底是什么。

E的those指代对象不明确，同时from在此处也很奇怪。

正式考试时，考生看到作文考题那一页，和本书上面的形式是一模一样的。

Many a student is…

Think carefully about the issue presented in the following excerpt and the assignment below:

Ecological light pollution is like the bulldozer of the night, wrecking habitat and disrupting ecosystems several billion years in the making. （metaphor, comparing light pollution to the effects of a “bulldozer”）

Without our past1, our future would be a tortuous path leading to nowhere3. In order to move up the ladder of success and achievement we must come to terms with our past and integrate it into our future. Even if2in the past we made mistakes, this will only make wiser people out of us and guide us to where we are supposed to be.

另外，C中的believe用了进行时态，这不符合believe的时态用法。在英文中，有些动词是不能用进行时态的。这类动词可以称

He was unable to work and he was disgrace. He was eventually dismissed from his office.

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