（11分）已知有机物A、B、C、D、X有如下转化关系，请按要求回答相关问题：
（1）若C物质的结构中含有醛基，则X的结构简式为
（2）若X的分子式为C10H20O2，且A不能发生消去反应，则A的结构简式为 ，
请写出A→B的反应的化学方程式
（3）若X的分子式为C14H12O2，则X→A+D的反应的化学方程式为 。
（4）若X的分子式为C8H16O2，请写出所有符合题意的X的结构简式 。
（11分）（1）HCOOCH3
(2) (CH3)3CCH2OH 2(CH3)3CCH2OH ＋O2
2(CH3)3CCHO＋2H2O
(3) 略（4）CH3CH2CH2COOCH2CH2CH2CH3、(CH3)2CHCOOCH2CH(CH3)2(3分)
| 完形填空。 阅读下面短文，从短文后所给各题所给的四个选项（A、B、C和D）中，选出 可以填入空白处的最佳选项。 | ||||
| Paul Carson, a music teacher, was driving along a country road with his sister Nora. 1 he saw a man in a big American car who _2 the man wanted by the police. 3 by a reward (奖赏) of fifty pounds, the sister and brother _4 to catch the criminal(罪犯) by following him 5 . As soon as the man entered Seldon Manor, a _6 belonging to Paul's friend Mr. Lightfoot, Paul shut him in and then drove to 7 . Realizing that Paul had made a _8 because the criminal had been put into prison that morning , the police officer set off immediately with Paul to set the man free. The man who was _9 up in the house was really an American visitor from 10 City. Paul and Nora felt very much 11 for what they had done. This 12 action of theirs would surely make them the laughing-stock of the whole town. But a letter from the American 13 changed the situation. _14 blaming(责怪) him, the American visitor thanked Paul for shutting him up in his 15 house. It 16 that Seldon Manor was the American ancestors' home. He had come 17 to England to look for it. In order to show his 18 , he offered the sister and brother a check 19 fifty pounds. Paul and Nora got the 20 in the end, though in a quite different way. | ||||
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