[例1]The shy girl never speaks unless______.

A.speaking　B.spoken　C.speaking to　D.spoken to

【解析】答案D。“连词unless+过去分词”结构组成句子成分，此处表示条件，“这个害羞的女孩从不说话除非别人先主动跟她说”。

[例2]Though______of the danger，he still went skating on the thin ice.

A.warning　B.to warn　C.warn　D.warned

【解析】答案D。本题也考查“连词+过去分词结构”，though引导表示让步，“尽管别人警告他危险，他还是继续在薄薄的冰上溜”。

[例3]______in England，Anne Bradstreet both admired and imitated several English poets.

A.Having born and educated　B.To be born and educated

C.Since born and educated　D.Born and educated

【解析】答案D。过去分词作状语，表示原因，“出生在英国，并且也在英国接受教育，Anne Bradstreet羡慕英文诗歌并模仿了几首”。

[例4]—How do you deal with the disagreement between the company and the customers？

—The key______the problem is to meet the demand______by the customers.

A.to solving；making　B.to solving；made

C.to solve；making　D.to solve；made

【解析】答案B。本题第一个空考查the key to短语，该短语后应加动词-ing作宾语表示“做某事的关键”，第二个空用过去分词作后置定语，修饰demand。“你们怎么处理公司与顾客的关系？解决这个问题的关键是满足顾客提出的需求”。

[例5]The film you saw last night was made______on a true story that happened many years ago.

A.base　B.to be based　C.based　D.basing

【解析】答案C。本题考查过去分词作宾语补足语的句法功能，“昨天晚上你看的那部电影是基于很多年前发生的一个真实的故事”。

[例6]Just as the value of a telephone network increases with each new phone______to the system，so does the value of a computer system increase with each program that turns out.

A.adding　B.to have added　C.to add　D.added

【解析】答案D。过去分词作后置定语，“正如电话系统的价值随着每一部新电话装置的开支不断增加一样，电脑系统的价值也随着每一个新程序的出现而增加”。

[例7]When first______to the market，these products enjoyed great success.

A.introducing　B.introduced

C.introduce　D.being introduced

【解析】答案B。本句考查过去分词作独立结构的用法，主句的主语these products一样适用于独立结构，实际是“When these products were first introduced to the market，”意思为“这些产品刚开始打入市场时，就取得了很大成功”。

[例8]These surveys indicate that many crimes go______by the police，mainly because not all victims report them.

A.unrecorded　B.to be unrecorded

C.unrecording　D.to have been unrecorded

【解析】答案A。该句中过去分词作系动词go的表语，相当于形容词，因此只能为unrecorded，意思为“这些调查表明很多罪行都没被警方记录下来，主要是因为并非所有的罪犯都交代了出来”。

[例9]The speaker，______for her splendid speeches，was warmly received by the audience.

A.having known　B.being known

C.knowing　D.known

【解析】答案D。本句中过去分词known作原因状语，“这位以出色的演讲著名的演讲家受到了观众热烈的欢迎”。

[例10]No matter how frequently______，the works of Beethoven always attract large audiences.

A.performing　B.performed

C.to be performed　D.being performed

【解析】答案B。No matter引导的让步状语成分原句应为“No matter how frequently the works of Beethoven are performed”，在此省略了主语和被动标志的系动词，意思为“无论演出过多少次，贝多芬的作品总是能吸引大量的观众”。