外研版高中英语必修一《完形填空》专项练习题（含答案）
Vast parts of Earth should be left wild
To avoid mass extinctions of plants and animals， governments should protect a third of the oceans and land by 2030 and half by 2050， with a focus on areas of high biodiversity． So say leading biologists in an editorial in the journal Science．
This isn't just about saving biodiver areas， says Jonathan Baillie of the National Geographic Society，one of the authors． It is also about saving ourlves by protecting 1 natural systems， or ecosystems，and their benefits to us， known as ecosystem rvices． "We are learning that the large areas that remain are important for providing rvices for all life． The forests， for exampleswear什么意思， are 2 for absorbing and storing carbon，" says Baillie．
At prent， just 3.6 per cent of the planet's oceans and 14.7 per cent of land is protected by law．cet全国网上报名系统 At the 2010 Nagoya Conference of the Convention on Biological Diversity， governments agreed to protect 10 per cent of the oceans and 17 per cent of land by 2020．
But this isn't nearly enough， says Baillie． In the editorial， he and his coauthor， Ya﹣Ping Zhang of the Chine Academy of Sciences， want governments to t much bigger 3 at the next major conference on biodiversity in 2020．
"We have to enormously 4 our ambition if we want to avoid an extinction crisis and if we want to maintain the ecosystem rvices that we 5 benefit from，" says Baillie． "The trends are in a 6 direction， it's just we have to move much faster教育部留学服务中心地址．"
It is hard to work out how much space is needed to prerve biodiversity and ecosystem 7 ， the pair say， becau there is so much we don't know about life on Earth ﹣ like how many species there are．
8 ， most estimates suggest that between 25 and 75 percent of high biodiversity regions or major ecosystems should be protected．Therefore，we， including governments，should be 9 when tting goals and strategies．
"There is no doubt that we need far more land and a 10 for conrving and retaining n
ature，"says James Watson at the University of Queensland in Australia． "Targets like 50 per cent are in the right ball park when it comes to the minimal 11 of area needed to conrve biodiversity．"
But Watson and others stress that which areas get protected is even more important than the overall percentage． "The key thing is to protect the right areas，otherwi什么意思" says Jo Montoya of the Station for Theoretical and Experimental Ecology in Moulis， France． "If we 12 protect a proportion of the territory，governments will likely protect what's easy， and that's usually areas of 13 biodiversity and ecosystem rvice provision．"
In fact英语听力下载， a third of the 3.6 percent of land that is already meant to be protected is actually being 14 ，Watson's team reported last month． So only 15 areas to be protected isn't enough造价师报名时间．
1．A．stricter B．wider C．safer D．simpler
2．A．unique B．sufficient C．critical D．fit
3．A．examples B．values C．awards D．objectives
4．A．increa B．achieve C．theportraitlack D．frustrate
5．A．barely B．currently C．roughly D．thoroughly
6．A．opposite B．fixed C．complex D．positive
7．A．approaches B．management C．benefitsmad world原唱 D．degradation
8．A．Therefore B．Furthermore C．However D．Otherwi
9．A．concerned B．changeable C．firm D．cautious
10．A．derted B．cured C．measured D．distributed
11．A．damage B．cost C．amount D．standard
12．A．completely B．merely C．virtually D．desperately授权委托书英文
13．A．mass B．tropical C．marine D．low
14．A．exploited B．expanded C．restored D．discovered
15．A．developing B．covering C．declaring D．utilizing
In Germany， it's normal to wear your own clothes at school， since there are no rules about uniform． So why did a few schoolmates and I spend two days 16 around the school in uniform？ In fact， during the two days， a rather 17 event took place： our MUN （Model United Nations） Conference．
It is a conference 18 for students from all German schools who want to e how the United Nations really works． They get an opportunity to 19 a country， maybe one they don't know much about， and 20 debate with other students from different 21 on real problems the world is facing now． The aim is to write a 22 at the end， which will help deal with them．
The 23 of our conference was "Transcend Borders： Discover Peace"， which dr congo 24 that the students would be looking at what caud 25 among countries and how to overcome it． "Transcend" is just a longer 26 for "cross"．
However， the students 27 breaking down not only physical national boundaries， but also tho 28 different nationalities． Of cour， this included how to help others who are forced to flee their homeland， for the people 29 all students．
