答案：
captive n.俘虏；
causative a. 引起…的；
arrive vi.到达；
assertive adj. 断言的
alive adj.活着；
alternative n.替换物；
abortive adj. 失败的；
abusive a. 辱骂的；
acquisitive adj. 贪得的；
active a.活跃的；
The captive was immured in a dungeon for over one month.
那名俘虏被监禁在地牢中一个多月。
We were held captive for one year.
我们当了一年俘虏。
Children come to zoos precisely to see captive animals
孩子们到动物园就是为了看圈养的动物。
Her heart had begun to pound inside her chest like a captive animal.
她心情紧张起来，一颗心在胸膛里扑通扑通跳个不停。
Airlines consider business travellers a captive market.
航空公司把商务旅行者视为垄断性市场。
The picture gave rise to speculation that the three were still alive and being held captive.
这张照片让人们猜测这3个人还活着，而且被囚禁起来了。
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