单项选择题

Questions 17—20 are based on the passage you have just heard. You now have 20 seconds to read Questions 17—20. What did the labor unions worry about

A．They might lose control of their members because of the increase in immigration.
B．Their members might find it difficult to get along with the newcomers.
C．The working condition of their members might deteriorate.
D．Their members might lose their jobs to the newcomers.

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单项选择题

Where does most knowledge of Asian elephants come from’

A．From the captured or tamed elephants.
B．From the British wildlife protection group.
C．From elephant hunters in Thailand and Burma.
D．From tourists visiting the Thai-Burmese border.

单项选择题

What do some New Yorkers think of graffiti

A．It will bring a lot of trouble to the local people.
B．it is a popular form of art.
C．It will spoil the natural beauty of their surroundings.
D．It is popular among rock stars.

Questions 17—20 are based on the passage you have just heard. You now have 20 seconds to read Questions 17—20. What did the labor unions worry about 您的浏览器不支持 audio 元素。

Questions 17—20 are based on the passage you have just heard. You now have 20 seconds to read Questions 17—20. What did the labor unions worry about