Items and Welfares Provided to Volunteers

Volunteers will be provided with a set of free Olympic Games volunteer uniforms and meals

during the work day

21. A Games volunteer will be required to work for at least-----------------.

A. one week B. two weeks C. three weeks D. four weeks

22. Who will be more likely to be accepted as a Games volunteer?

A. A Chinese B. A Russian C. An Australian D. A German

23. What will Games volunteers be provided with for free?

A Accommodation. B Clothing, C. Transportation, D Amusements

By the time Robert Porter Allen was born in 1905, the whooping crane(鸣鹤)was already in trouble. The beautiful bird was once commonly found across North America. By 1941, the whooping crane population had dwindled to the double digits. The tallest species in North America were critically endangered

In the 1940s, the remaining cranes migrate（以迁徒） every year from the Gulf Coast of Texas to somewhere in the north of Canada to breed(繁殖). The conservation community didn't know where the birds went. The wetlands where they used to spend winters were growing rarer and rarer as they tiny, non-migrating group of whooping cranes was alive in Louisiana in 1941, but the group had disappeared by the time Allen started his research.

In 1942, Allen undertook the whooping crane project Over the next three years, he did almost

constant field work that took him from Texas up the cranes' migration route to Nebraska, and on into Saskatchewan in search of the nesting ground of the birds.

Studying the bird in its breeding habitat and seeing how many birds were born would allow

conservationists to understand how to help the birds on their journey. But finding the whooping

crane 's nesting site meant difficult and fruitless air searches over northern Canada

In 1952, Allen wrote a report on the whooping crane. The report was a warning call to the

conservation community: only 33 migratory "whoopers" remained, and their nesting site still hadn't been found. Two years later, the whooping cranes breeding grounds in Canada's Wood Buffalo National Park were finally found, and Allen headed north to study them firsthand, an "incredibly difficult journey, "in Sprunt's words, Allen ,s work laid the groundwork for conservationists lo save the birds

Their efforts paid off as the numbers reached 57 by 1970 and 214 by 2005.Today, the whooping crane is still listed as endangered, but there are roughly 600 birds alive.

24. What is the passage mainly about?

A. It is a story about Allen's searching for a lost bird.

B. It is a story about the cranes ,Long migration flight

C. It is a story about the crane surviving the winters.

D. It is a story about conserving, the whooping crane