OneQuestions 27 to 29 are based on the passage you have just heard.

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A．Get ready for ecological changes.
B．Adapt to the new environment.
C．Learn to use new technology.
D．Explore ways to stay young.

A．Based on the poll of public opinions.
B．By interviewing people who file complaints.
C．By analyzing the domestic and international situation.
D．Based on public expectations and editors’ judgment.