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单项选择题

Passage One Questions 26 to 28 are based on the passage you have just heard.

A．We should drink more hard water.
B．We should drink mere soft water.
C．Ground water is good for the elderly people.
D．Ground water has to be, treated before we drink it.
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热门试题

单项选择题A．An essay examination.B．An objective examination.C．An open-book examination.D．A take-home examination.

A．An essay examination.
B．An objective examination.
C．An open-book examination.
D．A take-home examination.

单项选择题A．350 years.B．400 years.C．800 years.D．2,000 years.

A．350 years.
B．400 years.
C．800 years.
D．2,000 years.