(2012·重庆高考)-Coach, can I continue with the training?

　　-Sorry, you can't ________ you haven't recovered from the knee injury.

　　A．until B．before

　　C．as D．unless

　　解析：选C。考查连词的用法。根据句意"教练，我可以继续训练吗？""很抱歉，不可以，因为你的膝盖受伤还没有恢复过来"可知，此处应用引导原因状语从句的连接词as。故选C项。

　　三、Contrasting words --表示对比关系的词语

　　用于连接句子或成分与前文内容形成对比。这一类常见的连接词有：however, in contrast, instead, nevertheless, on the contrary, on the other hand, in comparison with, compared with, rather than等。

　　He didn't reply. Instead, he turned on his heel and left the room.

　　他没有回答，反而转身离开了房间。

　　[考题印证3]

　　3－1(2012·安徽高考)Queen Elizabeth Ⅱ is often thought to be the richest woman in the world.________， her personal wealth seems rather small.

　　A．Besides B．Otherwise

　　C．However D．Altogether

　　解析：选C。考查副词辨析。句意：女王伊丽莎白二世常被认为是世界上最富有的女性。然而，她的个人财富看起来相当少。besides"除此之外，而且"；otherwise"否则"；however"然而，不过"；altogether"总而言之"。根据句意可知，前后两句之间为转折关系，故选C。

　　3－2(2012·江西高考)He seems to be giving the impression that he didn't enjoy himself in Paris.________， he had a wonderful time.

　　A．Above all B．What's more

　　C．As a result D．On the contrary

　　解析：选D。考查关联词辨析。从前后不一致的说法可以得知中间用表示相反意思的关联词。A项表示"最重要的是"；B项表示"而且"；C项表示"结果"；D项表示"正相反"。

　　四、Additional words --表示递进关系的词语

常用来介绍一些补充性的信息，或表达语意的递进。这一类常见的连接词有：also, on top