“No one knows how long they are able to live for，but freezing is basically the format for many plant conservation attempts nowadays，” Jane Shen­Miller said.It's a good thing that at least some plants are tough enough to survive in the experience.

　　【语篇导读】　本文是一篇科普文字，介绍一个科研项目，一个对数万年种子的实验。

　　1．How were seeds and fruits originally in the underground chamber?

　　A．They were placed there by an animal.

　　B．They were trapped there during the Ice Age.

　　C．They were planted there by ancient farmers.

　　D．They were buried there after the earthquake.

　　解析　细节理解题。由第四段的第二句可知，当初是松鼠把它们埋在地下的，故选A项。

　　答案　A

　　2．Which of the following was NOT used to recreate the ancient plant?

　　A．Modern nutrients. B．Parts of the fruits.

　　C．Its frozen seeds. D．Plant pots with soil.

　　解析　细节理解题。由第五段可知，在培育新苗时没有用冷冻的种子。

　　答案　C

　　3．Why are scientists interested in this discovery?

　　A．It helps them learn how plant life has changed in the past 30,000 years.

　　B．It can help guide future efforts to protect endangered plants' life.

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