单项选择题
Questions 23 to 26 are based on the conversation you have just heard.
A．They will be de-nationalised. B．They are fast disappearing. C．They provide worse service. D．They lose a lot of money.
A．They could enjoy a happier family life. B．They could greatly improve their work efficiency. C．Many cancer cases could be prevented. D．Many embarrassing situations could be avoided.
A．How humans are to cope with global warming. B．How unstable the West Antarctic ice sheet is. C．How vulnerable the coastal cities are. D．How polar ice impacts global weather.