World Giraffe Day (世界长颈鹿) is an exciting annual event initiated by the Giraffe Conservation Foundation to celebrate the longest-

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问题     World Giraffe Day (世界长颈鹿) is an exciting annual event initiated by the Giraffe Conservation Foundation to celebrate the longest-necked animal on the longest day or night (depending on which hemisphere (地球半球) you live!) of the year on 21 June—every year!
    Not only is it a worldwide celebration of these amazing and much-loved animals, but an annual event to raise support, create awareness and shed light on the challenges giraffe face in the wild. By supporting World Giraffe Day, you directly help save giraffe in Africa.
    With only approximately 111,000 giraffe remaining in the wild, giraffe were listed as Vulnerable to Extinction (易危级别) on the Red List of Threatened Species in 2016.  Giraffe numbers in Africa have dropped by a surprising 30% over the last 30 years alone, and likely more than 90% in the last century. This silent extinction is happening before our eyes, but we can still turn this around if we start acting now!
                                                                    World Giraffe Day
    Date: 21 June
    Initiator: the【R1】________
    Aims: 1) celebrating the longest-necked animal;
    2)  raising【R2】________and creating awareness;
    3)  shedding light on the【R3】________giraffe face in the wild Population:
    1) approximately【R4】________remaining in the wild;
    2) dropping by【R5】________over the last 30 years and more than 90% in the last century
【R5】

选项

答案30%

解析 通过关键词dropping by和over the last 30 years定位到原文第三段第二句。该句指出,非洲的长颈鹿数量在过去三十年里减少了30%,比上世纪减少了90%。通过对比题干和原文可知,空格处应该填入过去三十年长颈鹿减少的比例。因此可以确定本题的答案为30%。
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