64. How did the fruit originally get underground?    A. It was placed there by an animal.

　　   B. It was trapped there during the ice-age.    C. It was planted there by ancient farmers.

　　D. It was buried there after the earthquake. 65. 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 plant-life.    C. It can provide directions for where to look for other ancient plants.    D. It proves that all plant life can survive for thousands of years when frozen. 66. The underlined word “they” in the final paragraph refers to _______.    A. plants   B. seeds  C. scientists   D. storage lockers 67. The purpose of the passage is to _______.    A. discuss a plant conservation effort

　　   B. introduce some ancient plants    C. outline some causes of global warming

　　D. describe a scientific research project

　　66.【答案】B

　　【解析】根据前一段的最后一句“If a plant ever goes extinct, scientists could bring it back by taking its seeds from the Svalbard or other storage lockers”可知，此处的they指的应该是seeds。

　　【考点定位】考查推理判断题。

　　67.【答案】D

　　【解析】本文主要讲了科学家受到一颗冷冻的种子的启发，尝试用此方法来保存种子，因此这是一个研究项目。故D项正确。

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