题目内容

20．---Why didn't you try your best to get on the train？
---I tried，but ______ I could，it started to move．（　　）
A．whenB．afterC．untilD．before

分析 ---你为什么没尽量上火车呢？
---我试过了，但是我还没来得及上车，它就开动了．

解答 答案：D
 根据答语可知，此处表达的意思是：我还没来得及上车（在我试着上车之前），火车就开动了；A when 在…时候； B  after在…以后；  C  until到…为止，或在…以前，在这种用法中，句子的谓语动词必须是持续动词，如live，wait，last，stay，work，continue 等，而此处省略的谓语 get on （上车）是非延续性动词；故排除C；  D  before在…之前，还没来得及…就；由于A．B用在此处不合句意；故选D

点评 本题考查了连词before的用法．做本题时，首先应根据句意，判断出空缺处所表达的意思；其次应熟练掌握选项中各连词的意义及用法区别，尤其是 until当"在…以前"讲时，与before的区别．

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[写作内容]
1以约30词概括上文的主要内容．
2以约120词就"持之以恒"这个话题发表你的看法，内容包括：
（1）你读后的感受；
（2）用你自己或他人的经历说明持之以恒的重要性；
（3）呼吁大家坚持就是胜利．
[写作要求]
1作文中可以使用亲身经历或虚构的故事．也可以参照阅读材料的内容，但不得直接引用原文中的句子．
2作文中不能出现真实姓名和学校名称．
[评分标准]
概括准确，语言规范，内容合适，语篇连贯．

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