Hristo Hristov has been working with wildlife in Bulgaria's remote Rhodope Mountains for over 30 years.He first came here as a bright-eyed student in the early 1990s，eager to increase the number of griffon vulture （歐亞尤雪）.At the time，there were fewer than 20 birds left.Fast forward to November 2020，there were more griffon vultures.At the last count，a record 245 now live in the Rhodope Mountains.
   As a rewilding officer，Hristo is responsible for the welfare of the animals in his area，which means constant observation，and lengthy periods out in the wild conducting research. "This process is sometimes long - you have to live together with the animals，" he explains." Forget everything；you live in nature.It doesn't matter if they're horses，wild cattle or European bison （野牛）."
   This small corner of south-eastern Europe is one of the continent's most ecologically diverse areas.Large animals，such as wolves，brown bears，deer，and wild horses，coexist here.It's also a peaceful place for birdlife，with 300 species recorded.The ultimate goal is to create a habitat where multiple different species depend on one another.
   Hristo's current challenge is to continue the reintroduction of European bison to the wild.Since 2013，Hristo has worked with Rewilding Europe，a not-for-profit organisation which operates across Europe，to bring bison back to the Rhodope Mountajye.ais.In 2019，several bison were released into the wild，and three baby bison have already been born，two of those coming in 2020.At the end of last year，another two females were donated to the project from zoos in Hungary and Slovakia.When the new animals are eventually released into the wild，they will number 13.

（1）What can be learned about griffon vultures？

C

C

A．They are now in danger of dying out.
B．They may live as long as over 30 years.
C．They can be seen in the Rhodope Mountains.
D．They were first discovered in the early 1990s.
（2）Which of the following can best describe Hristo？

D

D

A．Proud but caring.
B．Silent but generous.
C．Honest and creative.
D．Devoted and patient.
（3）What does the author intend to do in paragraph 3？

B

B

A．Develop the theme with examples.
B．Add some background information.
C．Summarize the previous paragraphs.
D．Introduce a new topic for discussion.
（4）What can we expect of European bison's population in the future？

C

C

A．It will be hard to assess.
B．It will start to explode.
C．It will show promise.
D．It will be something to worry about.