单项选择题

Questions 11 to 13 are based on the following interview with George Schaller, a world famous biologist, about his painstaking studies of mammals all over the world. You now have 15 seconds to read Questions 11 to 13. What is one of the mistakes in the recent conservation movement（）

A．To add moral values to conservation.
B．To regard nature only as resources.
C．To attach spiritual values to nature.
D．To regard nature only as the wilderness.

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单项选择题

Karadaglic attributes the declining popularity of the classical guitar to（）

A．the upsurge of pop music
B．the shortage of suitable music.
C．its intimacy with the audience.
D．the use of electric guitars.

单项选择题

Field testing in America has shown that（）

A．non-GM crops are more environment-friendly than GM crops.
B．concerns over the threats of GM crops are exaggerated.
C．GM crops pose serious threats to biodiversity.
D．cross-pollination has introduced nasty species into the human food chain.