Britain’s seed(种子) bank, the only one in the world aiming to collect all of the

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Britain’s seed(种子) bank, the only one in the world aiming to collect all of the planet’s wild plant species, has reached its goal of banking 10 percent by 2010.
The Millennium Seed Bank Project, run by Kew Gardens—one of the oldest botanical(植物的)  gardens—will officially place the 24,200th species on Thursday, a pink, wild banana from China.
More than 50 countries are now on board with Kew"s giant task but vast places of the globe, including India and Brazil, still need to join in and donate seeds, director Paul Smith said.                                                                                                                                                            
The seed bank is one of the largest and most diverse(多样的) in the world with more than 1.5 billion seeds. Its goal is to help protect the planet’s bio-diversity during a time of climate change.
The wild banana seed is under threat of extinction(灭绝) in southwest China from agricultural development. It is a vital food source for Asian elephants and important for growing bananas for human eating.
Stored at minus-20 degrees centigrade, so they can last for thousands of years, the seeds await the day that scientists hope never comes—when the species no longer exist in the wild.
It is a race against time, Smith said, because in the last ten years alone, 20 plants held in the bank have already been wiped out in the wild. He estimates that between a third and a quarter will become extinct this century.
"It is pressing and it is happening now. An area, the size of England, is cleared of primary vegetation（植被）every year." Smith said.
Because most of the world"s food and medicines come from nature, protecting wild plant species is quite important, scientists say. There are already many other seed banks safeguarding food crops, which only account for 0.6 percent of plant diversity.
For Kew"s next goal—to collect a quarter of wild varieties（种类）by 2020—the botanists need 10 million pounds a year, or a further 100 million pounds on top of the 40 million they have already been granted.
小题1:What’s the final purpose of the Britain’s seed bank?

A．To collect enough money for the project.	B．To safeguard food crops.
C．To protect wild plants from extinction.	D．To help scientists study wild plants.

小题2:We can learn from the passage that _______.

A．the seeds in the bank can be used now and then all over the world

B．India and Brazil haven’t joined in the Seed Bank Project at present

C．there is only one seed bank in the world at present

D．the wild plants in places like India and China will never die out

小题3:What does the underlined word “it” in paragraph 7 refer to?

A．The extinction of plant species.

B．The Millennium Seed Bank Project.

C．Britain’s seed bank.

D．Kew Gardens’ next goal.

小题4:Which of the following isn’t spoken about in the passage?

A．The global partnership of collecting wild plant species.

B．The temperature condition of the wild plant species in the bank.

C．The government’s support for the seed bank project by giving money.

D．Scientists’ concern on the extinct wild plant species.

答案

小题1:C
小题2:B
小题3:B
小题4:C

解析

试题分析：文章讲述了在气候变化，很多物种濒临灭绝的情况下，伦敦种子银行的开办、运营它所进行的“千年种子库计划”，具有重大意义。
小题1:细节理解题。由第一段和第四段内容可知，伦敦种子银行旨在通过收集自然界的植物种子以达到保护自然界生物多样性的目的。
小题2:推理判断题。由第三段Paul Smith的话可知，印度和巴西还没有参与种子银行捐种子的活动，故选B项。其他三项与文章内容不一致。
小题3:细节理解题。本文主要讲的是伦敦种子银行和它所进行的“千年种子库计划”，结合It所在句子可知，是这项计划在和时间赛跑。因此选B。
小题4:细节理解题。文章最后一段只是说实现下一个目标植物学家每年还需要很多资金，并没提到政府的财政支持。
点评：文章讲述了伦敦种子银行的开办、运营它所进行的“千年种子库计划”。科普知识类文章结构一般也是由标题(Headlines),导语(Introductions)背景( Background)主体(Main body)和结尾(Ends)五部分构成。导语一般位于整篇文章的首段。背景交待一个事实的起因。主体则对导语概括的事实进行详细叙述。这一部分命题往往最多，因此，阅读时要把这部分作为重点。结尾往往也是中心思想的概括，并与导语相呼应，命题者常在此要设计一道推理判断