[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.