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【D】
解析：本句的意思是“大卫修机器的时候，弄伤了自己”，表示当一个动作正在进行时，另外一个动作突然发生，所以应该选择过去进行时和一般过去时。动词hurt的过去时形式是hurt，所以答案为D。
7. It ____________ whether he will go on with his study at the university.
A. hasn't been decided B. isn't decided C. hasn't decided D. doesn't decide 【A】
解析：it在句中作形式主语，代替whether引导的从句，指的是“他能否上大学”这件事情。某一“事件”作主语时应该选择被动语态，故可以排除C和D。本句的意思是“这件事情还没有决定”，强调的是目前的情况，所以要用现在完成时，所以答案为A，意思是“他能否上大学这事儿还没定下来”。
8. He said that he ____________to the United States.
A. had never been B. had never gone C. was never D. has never been【A】
解析：have been to a place的意思是说话时已经去过某地，现在已经回来了；have gone to a place的意思是说话时已经去某地了，现在还没有回来。本句的主句是一般过去时，所以从句应该选择过去完成时，即答案为A，意为“他说他从没去过美国”。 9. This time last year I ____________my holiday in the countryside. A. have B. was having C. am having D. have had【B】 解析：根据时间状语this time last year（去年的这个时候），我们可知本句的动词应用过去进行时，所以答案为B，意为“去年的这个时候，我正在乡下度假”。 10. \ \ A. will go B. has been C. has gone D. went【C】
解析：have been to a place的意思是说话时已经去过某地，现在已经回来了；have gone to a place的意思是说话时已经去某地了，现在还没有回来。分析句意，Mary在说话时去学校了，还没回来，所以答案为C，意为“——玛丽在哪？——她去学校了”。 11. I'm sorry that I____________you had been there already.
A. won't know B. didn't know C. don't know D. haven't known【B】 解析：从句you had been there already用的是过去完成时，可知动词know应该选用相应的过去时态，所以答案为B，意为“对不起，我不知道你已经到这儿了”。 12. It____________hard when I left the house.
A. is raining B. rains C. was raining D. will rain【C】
解析：根据时间状语从句when I left the house（当我离开家的时候）可知主句应表示“天正在下雨”，所以应该选择进行时态。从句用的是一般过去时，主句也应用相应的过去时态，所以答案为C，意思是“当我离开家的时候，天正在下雨”。
13. Tim ____________ a great number of different places in Australia.
A. already has visited B. has already visited C. has visited already D. has ever visited【B】
解析：在完成时态中，副词already和just等应放在助动词have、has、had和动词过去分词之间，所以答案为B，意思是“汤姆已经游览了澳大利亚很多不同的地方”。 14. Up to now, I ____________ very successful.
A. am not B. haven't been C. was not D. were not【B】 解析：根据时间状语up to now（直到现在），我们可知本句的动词应用完成时态，所以答案为B，意思是“到目前为止我还不是很成功”。 15. The wheat ____________cut three days ago.
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A. were B. has been C. had D. was【D】
解析：短语three days ago是一般过去时的时间状语，主语the wheat是不可数名词，所以应选D，意思是“麦子三天前就割了”。
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Ⅱ. Put the verbs in the brackets into their proper forms.（把动词在括号内进入他们的适当的形式。）
1. If you ___(not tell) him the truth now, he simply ___ (keep) on asking you until you___(do). 【解析】：if引导的条件状语从句中有时间状语now，应用一般现在时。主句的动作还没有发生，应用一般将来时，而until引导的从句也应该用一般现在时。整个句子的意思是：“如果你现在不告诉他事实，他会不停地问你，直到你说了为止。” 2. She ___(be) here just now, but she ___(go). 【解析】：短语just now是表示一般过去时的时间状语，所以第一空应该填was。转折连词but引导的分句的意思是“她现在走了”，应该用现在完成时，表示对现在造成的影响。整个句子的意思是：“她刚才在这儿，但是已经走了。”
3. I ___(receive) John's invitation yesterday, and___ (accept) it at once. I___(not see) him for several weeks. 【解析】：根据时间状语yesterday可知receive 和accept 两个动作均发生在昨天，所以应该用一般过去时。而根据时间状语for several weeks可知谓语动词所表示的动作是延续性的，所以应用现在完成时。整个句意是：“昨天我收到了约翰的邀请，立刻就接受了。我已经几周都没看见他了。”
4. —___(you, see) my umbrella? I can't find it. — You___(leave) it in the classroom. I ___(pick) it up and___(put) it in the closet. 【解析】：第一句话的意思是“你看见我的雨伞了吗？我找不到了”，第一空应用现在完成时，表示过去的动作对现在造成的影响或结果。第二句话的意思是“你丢在教室了。我捡起来放在壁橱里了”，所有的动作均发生在过去，应该用一般过去时。
5. When I ____(buy) my new house I____ (ask) for a telephone. The Post Office____(tell)me to wait, but I____ (wait) a year now and my phone still ____(not come). 【解析】：根据句意，我们可知“买房子和装电话”这两件事均发生在过去，所以前三空应该用一般过去时。在but引导的分句中有时间状语now，表示wait这个动作从过去发生，一直延续了一年时间，所以应该用现在完成时；而现在的结果是“电话还没有装上”，所以come 也应用现在完成时。整个句子的意思是：“当我买上新房子的时候，就要求装一个电话。邮局告诉我让我等。现在我已经等了一年了，还是没装上。”
6. I ____(can, not, go) out that night because I____(promise) to wait for Jim at home. 【解析】：根据时间状语that night，我们可知第一空应该用一般过去时，而because引导的从句中的动词promise发生在主句动作之前，所以应该用过去完成时。整个句意为：“那天晚上我出不去，因为我答应吉姆要在家里等着他。”
7. I ___(go) back to my hometown two years ago. I___ (find) that it___ (change) greatly. 【解析】：根据时间状语two years ago，我们可知第一空应该用一般过去时。第二句话中的动词find 也发生在过去，所以也应用一般过去时。而动词change发生在find之前，所
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以应该用过去完成时。整个句意为：“两年前，我回了一趟家乡。我发现它发生了很大的变化。”
8. When you___ (come) yesterday, I___ (feel) very tired because I ___(work) in the garden all day. 【解析】：根据时间状语yesterday，我们可知第一空应该用一般过去时。第二话中的动词feel应用过去进行时，表示“当你来的时候，我正感到累”。根据时间状语all day可知句中动作应该是持续了一整天，所以应用过去完成时。整个句子意思是：“昨天你来的时候，我正觉得非常累，因为我在花园里干了一整天。”
9. John___ (walk) to his car when he stoppe D. He suddenly___ (remember) that he___ (not lock) his office. 【解析】：根据时间状语when he stopped（突然停了下来），可知主句动作正在进行当中，所以第一空应用过去进行时。第二空应用一般过去时，表示过去发生的动作。第三空动词lock所表示的动作发生在remember之前，所以要用过去完成时。整个句子的意思是：“约翰正朝着车走过去，突然他停了下来。他想起来自己没有锁办公室门。” 10. —___(you, apply) for the job?— I___ (write) to them last month, but they ___(not, answer) yet. 【解析】：根据句意，可知apply这个动作发生在过去，而句子强调的是对现在造成的结果，所以应用现在完成时。根据时间状语last month，可知第二空应用一般过去时。根据时间状语yet 可知最后一空应用现在完成时。整个句意是：“——你申请这份工作了吗？——我上个月就给他们写信了，但现在还没收到回复。”
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Ⅲ. Translate the following sentences into English.（将下列句子译成英语。） 1. 他于2002年10月入伍，参军已5年了。参考答案：He joined the army in October 2002. He has been in the army for five years.
2. — 我买了一本汉英词典。参考答案：— I've bought a Chinese-English dictionary. — 在哪儿买的？参考答案：— Where did you get it?
— 在学校旁边的书店。参考答案：— The bookstore next to our school. 3. — 你吃早饭了吗？参考答案：— Have you had your breakfast?
— 没有，我经常不吃早饭就去上学。参考答案：— No. I often go to school without breakfast.
4. 我以为你回家了。参考答案：I thought you had gone home.
5. 上周我听了一场音乐会，这是我听过的最好的音乐会。参考答案：Last week I went to a concert. That was the best concert I had ever hear D. 6. 昨天下午等所有的学生交了卷我才离开。参考答案：I didn't leave yesterday afternoon till all the students had handed in their papers. 7. 我们还没有找到座位电影就开始了。参考答案：The film began before we had found our seats.
8. 我们刚离开晚会，天就开始下雨了。参考答案：We had hardly left the party when it began to rain.
9. 第一次世界大战爆发于1914年。参考答案：The First World War broke out in 1914. 10. 艾丽丝说她打算去乡下度周末。参考答案：Alice said that she was going to spend the weekends in the countryside.
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Unit 3
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Ⅰ. Turn the following sentences into complex sentences.（把下列句子变成复杂的句子。）
1. I received two gifts. I didn't accept them. 参考答案：Although I received two gifts, I didn't accept them.
2. I can't find the person. His car is blocking the way. 参考答案：I can't find the person whose car is blocking the way.
3. That is the place. The plane crashe D. 参考答案：That is the place where the plane crashe D.
4. There was a time. People believed that the sun moved around the earth. 参考答案：There was a time when people believed that the sun moved around the earth. 5. When will we have the meeting? Do you know that? 参考答案：Do you know when we will have the meeting?
6. How long is the Yellow River? I often wonder. 参考答案：I often wonder how long the Yellow River is.
7. I don't believe that. He said that at the meeting. 参考答案：I don't believe what he said at the meeting.
8. I want to know it. Who has reported the news? 参考答案：I want to know who has reported the news.
9. The newspaper carried a funny story. In the story a man often ate metals. 参考答案：The newspaper carried a funny story in which a man often ate metals. 10. He asked me. Where have you been? 参考答案：He asked me where I had been. Page 79
Ⅱ. Choose the best answer to complete each of the following sentences.（选择最佳答案,完成以下句子。）
1. ____________we need more practice is quite clear. A. If B. What C. That D. / 【C】
解析：本题考查主语从句的用法。we need more practice是一个完整的句子，只能用that来引导，构成主语从句，意思是“我们需要更多的练习，这很清楚”，所以答案为C。 2. The reason I have to go is ____________ if I don't.
A. that she will be disappointed B. because she will be disappointed C. on account of her being disappointed D. that she will be disappointing【A】
解析：本题考查表语从句的用法。分析4个选项可知，she will be disappointing是错误的表达法。而she will be disappointed是一个完整的句子，只能由that引导，构成表语从句，意思是“我必须走的原因是如果我不这么做，她会很失望”，所以答案为A。 3. I wonder____________he asked such a silly question in publiC. A. how B. what C. that D. why【D】
解析：本题考查宾语从句的用法。分析句意，只能选择why引导的从句，意思是“我想知道他为什么当众问这种愚蠢的问题”，所以答案为D。 4. I don't think____________.
A. that he came to the concert yesterday true B. true that he came to the concert yesterday