单项选择题


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

A．One month.
B．One month and a half.
C．Two months.
D．Two months and a half.
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填空题
Fresh water supplies in Asia and south America is disappearing as the glaciers melt away.
单项选择题
A．Lower prices.B．More choices.C．More competition.D．More companies.
A．Lower prices.
B．More choices.
C．More competition.
D．More companies.
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