解析：选B　分析句子结构可知，________ we danced at the party last night为定语从句；再根据dance to ...是习惯表达，故选B。

　　6．Though ________ alone at home by his parents that night, the boy didn't seem to be unhappy.

　　A．leaving B．left

　　C．being left D．having left

　　解析：选B　Though left alone ...是Though the boy was left alone ...的省略形式。

　　7．(上海高考)Today we have chat rooms, text messaging, emailing ... but we seem________ the art of communicating face­to­face.

　　A．losing B．to be losing

　　C．to be lost D．having lost

　　解析：选B　句意：今天我们可以通过聊天室、短信息、电子邮件等进行交流，但是我们似乎正在失去面对面沟通的技巧。seem后面常跟不定式，不定式可用一般式、进行式或完成式。此处表示现阶段正在进行的动作，故用不定式的进行时。

　　8．The girl had hardly rung the bell________ the door was opened suddenly, and her friend rushed out to greet her.

　　A．before B．until

　　C．as D．since

　　解析：选A　句意：女孩还没来得及按门铃，门就突然打开了。她的朋友突然冲出来欢迎她。根据"rung the bell"和"the door was opened"的发生顺序可以得出答案。

　　9．I should have made full preparations for the interview - it turned out to be much more difficult than I ________.

　　A．have expected B．did expect

　　C．would expect D．had expected

　　解析：选D　根据语境可知，expect这个动作发生在turned out之前，即"过去的过去"，故用过去完成时。

　　10．(山东高考)________ I have to give a speech, I get extremely nervous before I start.

　　A．Whatever B．Whenever

　　C．Whoever D．However

解析：选B　句意：无论何时发表演讲，我在开始之前都会很紧张。根据句意可知，此处所缺的意思是"无论何时"，所以选B。其余三项的意思分别是"无论什么"、"无论谁