in the printing process, titanium dioxide in the chemical compound(化合物) loses electrons, 7.____________are then obtained by the Prussian blue. Most of the sheet loses its blue color, 8.____________(leave) behind words!
But the words on the paper are readable for 9.____________limited time only. After five days, the sheet of paper will have returned to its original blue color and the words will be gone. The duration(持续时间) is even 10.____________(short) if the paper is heated, even for only a few seconds.
[解题导语] 本文主要介绍了一项新的发明——可多次复印的特殊纸张。
1．scores 解析：考查固定词组。scores of 为固定词组，意为“大量，很多”，与times呼应。
2．to 解析：考查介词。up to ...意为“到达(某数量)”，与80 times 呼应，故用介词 to。 3．be made 解析：考查被动语态。make 和句子主语 paper 之间构成逻辑上的被动关系，且与情态动词 could 呼应，故用be made。
4．safely 解析：考查副词。修饰动词应用副词，故用副词safely 在句子中作状语。 5．loses 解析：考查动词时态和主谓一致。与上文 include 呼应可知，此处应用一般现在时，且由主语 The blue component 为单数形式可知，应用 loses。
6．itself 解析：考查代词。此处 itself 是反身代词，和句子主语The special paper表示同一物，起强调的作用。
7．which 解析：考查定语从句。which 引导非限制性定语从句，在从句中作主语，修饰先行词 electrons。
8．leaving 解析：考查非谓语动词。leave 和句子谓语 loses 之间没有连词，且与其逻辑主语构成主谓关系，故用现在分词作状语。
9．a 解析：考查冠词。time 作“一段时间”讲时是不可数名词，但被冠词和形容词修饰时，表示具体的概念，故此处用不定冠词 a 修饰。
10．shorter 解析：考查形容词比较级。此处的 even for only a few seconds 和上文的 After five days 形成对比，由此可知时间更短，故用 shorter。
B (2017·长春监测二)On the first day of her work, Sally found that a class full of problems was waiting for her. She was told six teachers 1.____________(quit) before her. When she walked into the classroom, it was chaos: two boys were fighting in a corner, yet 2.____________rest of the class seemed not to notice them; some girls were chatting and some were running about with paper, food packages and other garbage 3.____________(leave) everywhere.
Sally walked onto the platform, 4.____________(pick) up a piece of chalk and wrote on the blackboard: “Rule 1: We are family！”All students stopped 5.____________(look) at her. And she continued with Rule 2, Rule 3 ... In the following weeks, Sally worked out 10 class rules and
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posted them 6.____________the wall of the classroom. She patiently explained all the rules to the students and required everyone to follow them.
7．____________(surprise), Sally was not driven out like the former teachers; 8.____________， she won respect from the students. Over the years, she has witnessed gradual changes in the class. At the graduation ceremony, just 9.____________she expected, she was very proud to stand with a class of care，manners and 10.____________(confident)．
[解题导语] 本文讲述了一名老师通过努力制定课堂规则，最终感化学生的故事。 1．had quit(ted) 解析：考查动词的时态。句意：她被告知在她之前已有六位老师辞职。根据语境，quit 的动作发生在 was told 之前，即“过去的过去”，应用过去完成时。故填 had quit(ted)。
2．the 解析：考查冠词。句意：当她走进教室的时候，教室里一片混乱：两个男孩在角落里打架，而班里剩下的人好像根本没注意到他们；一些女孩在聊天，一些人在到处跑，到处都是纸、食品袋和其他垃圾。the rest of 为固定短语，意为“其余的”。故填 the。 3．left 解析：考查非谓语动词。句意见上一题解析。此处为“with＋宾语＋宾补”的复合结构，逻辑主语为 paper, food packages and other garbage，与动词 leave 之间是被动关系，故用过去分词作宾补。故填 left。
4．picked 解析：考查动词的时态。句意：萨莉走上讲台，拿起一支粉笔在黑板上写下：“规则1：我们是一家人！”。分析句子结构可知，设空处与 walked 和 wrote 为并列的谓语动词，因此，应用一般过去时，故填 picked。
5．to look 解析：考查非谓语动词。句意：所有学生都停下来看着她。此处指学生停下正在做的事情来看她，stop to do sth. 意为“停下来去做某事”。故填to look。
6．on/onto 解析：考查介词。句意：接下来的几周，萨莉制定了10条班级规则，并把它们张贴在教室的墙上。post...on/onto...意为“把??张贴在??上”，故填 on 或 onto。 7．Surprisingly 解析：考查词性转换。句意：令人惊讶的是，萨莉并没有像之前的老师那样被赶走，反而赢得了学生们的尊重。设空处在句中作状语，修饰整个句子，应用副词。故填 Surprisingly。
8．instead 解析：考查副词。句意见上一题解析。根据句意可知，上下文是对比关系，设空处表示“而不是；相反”。故填instead。
9．as 解析：考查定语从句。句意：在毕业典礼上，正如她所期待的那样，她非常自豪地与一个细心、礼貌并且自信的班级站在一起。本句是一个非限制性定语从句，修饰整个句子，且位于句首，根据句意可知，设空处表示“正如”。故填 as。
10．confidence 解析：考查词性转换。句意见上一题解析。设空处作介词 of 的宾语，应用名词，故填 confidence。
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(2017·贵阳一中第四次适应性考试)Imagine a road crossing without the three－way traffic signal. Cars, trucks, school buses, bicyclists and students walking to school would try to rush through the crossing 1.____________the same time. Their safety would be in danger.
Thanks to an African－American 2.____________(invent) named Garrett Augustus Morgan, we have three－position traffic signals that help make crossings much safer. Mr.Morgan was born in Kentucky in 1877. He only 3.____________(receive) six years’ education. As a teen he left his family’s farm in search of better opportunities. 4.____________(live) in Cincinnati, Ohio, he continued his studies in English grammar. Then he moved on to Cleveland 5.____________he worked as a repairman for a clothing factory. He had a keen interest in solving problems 6.____________(meet) in everyday life. Later he patented (获得??的专利权)several inventions. The three－way traffic signal was just one of his famous inventions. One day he felt very sad when he saw a traffic accident. 7.____________(help) reduce traffic accidents and save people’s lives, he 8.____________(immediate) began to work on the invention. Finally, it was 9.____________great success which saved lives then, and 10.____________(be) still saving lives today.
[解题导语] 本文介绍了发明三岔路交通信号灯的非裔美国人，并介绍了这一发明对人类的重要性。
1．at 解析：考查介词。句意：汽车、卡车、校车、骑自行车的人、步行去学校的学生可能会同时想冲过十字路口。at the same time 意为“同时”，为固定短语。故填 at。 2．inventor 解析：考查词性转换。句意：多亏一位名叫加勒特·奥古斯塔斯·摩根的非裔美国人的发明家，我们才拥有了三岔口的交通信号灯，帮助我们更安全地过马路。设空前有冠词 an 及 African－American 修饰， 因此设空处应用名词形式；根据 named Garrett Augustus Morgan可知，此处指人。故填 inventor。
3．received 解析：考查动词的时态。句意：他仅仅接受了六年的教育。根据句意，此处讲述过去的事情，故应用一般过去时。故填 received。
4．Living 解析：考查非谓语动词。句意：他居住在俄亥俄州的辛辛那提并继续学习英语语法。live 与主语 he 之间为主动关系，因此应用现在分词作伴随状语。故填Living。 5．where 解析：考查定语从句。句意：之后他搬去了克利夫兰，在那里他在一家服装厂做修理工。分析句子结构可知，设空处引导定语从句，先行词为 Cleveland, 且在从句中充当地点状语，故应用 where 引导该从句。
6．met 解析：考查非谓语动词。分析句子结构可知，句中已有谓语 had，设空处应用非谓语动词；meet 与 problems 之间为被动关系，故用过去分词作后臵定语。故填 met。 7．To help 解析：考查非谓语动词。句意：为了帮助减少交通事故，拯救人们的生命，他立刻开始致力于这项发明。根据句意可知，设空处在句中作目的状语，应用动词不定式。故填 To help。
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8．immediately 解析：考查词性转换。句意见上一题解析。设空处修饰谓语动词 began, 应用副词形式。故填 immediately。
9．a 解析：考查冠词。句意：最终，这项发明取得了伟大成功，拯救了生命，并在当今仍在拯救生命。success在此为抽象名词具体化，表示“一件成功的事”， 其前应用不定冠词 a。
10．is 解析：考查动词的时态。句意见上一题解析。根据时间状语today 可知，此处应用一般现在时，主语为 it，故填 is。
专题强化训练2 语法填空(二)[学生用书P86(单独成册)]
A
(2017·唐山一模)With only about 1，800 ones left in the wild, all giant pandas are precious. However, Qizai, 1.____________ seven－year－old panda that lives at the Foping Panda Valley in China’s Shaanxi Province, is even more so. That’s because he is among a handful of giant pandas 2.____________(know) to be the only one 3.____________brown and white fur in the reserve. The 220－pound Qizai has become a superstar, and many 4.____________(toy) in his color have been made. However, life has not always been easy for him.
It was when he was just two months old that Qizai was abandoned by his mother. He spent his early years at the Shaanxi Rare Wildlife Rescue Center. Then he 5.____________(send) to his current home，6.____________there were many other giant pandas. However, the other pandas seemed 7.____________(dislike) him and often bullied(欺负) him by stealing his bamboo.
Researchers are not sure why Qizai has different fur. Some assume that the brown fur is a result of a gene problem and 8.____________think that it is due to climate. 9.____________(hopeful), scientists will be able to make a 10.____________(discover) by observing Qizai’s children.
[解题导语] 世界上只有1 800只野生大熊猫，因此它们弥足珍贵，而拥有棕色皮毛的大熊猫七仔则更加稀有。
1．a 解析：考查冠词。句意：然而，七仔——一只生活在中国陕西省佛坪熊猫谷的七岁大熊猫则更加珍贵。分析句子结构可知，此处____________seven－year－old panda是Qizai的同位语，且句中panda是单数，故填不定冠词a，表泛指。
2．known 解析：考查非谓语动词。句意：那是因为我们都知道它是保护区内一群大熊猫中唯一一只有着棕白相间的毛色的大熊猫。设空处在句中作定语，修饰pandas，且逻辑主语pandas与动词know 之间为被动关系，故填过去分词known。
3．with 解析：考查介词。句意见上一题解析。根据句意可知，这只大熊猫具有这样的特征。with有“具有；带有”的意思，符合句意。故填with。
4．toys 解析：考查名词单复数。句意：这只重220磅的大熊猫七仔已成为超级明星，很多玩具的颜色都做得跟它的一样。toy为可数名词，其前有many修饰，故应用复数形式，
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