单项选择题

Questions 11 to 18 are based on the conversation you have just heard.

A．Reasons.
B．Advice.
C．Leave.
D．Opinions.
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单项选择题
A．There is a greater demand of clean water.B．More water sources are polluted or disappearing.C．Developed countries consume too much water.D．More water is ruined and developed countries consume too much.
A．There is a greater demand of clean water.
B．More water sources are polluted or disappearing.
C．Developed countries consume too much water.
D．More water is ruined and developed countries consume too much.
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