单项选择题

A．portion
B．percentage
C．proportion
D．fraction
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问答题
The Importance of Water ResourceYou are to write in three parts.In the first part state what you think is the best way.In the second part, support your view with one or two reasons.In the last part, bring what you have written to a natural conclusion or summary.Marks will be awarded for content, organization, grammar and appropriacy. Failure to follow the instructions may result in a loss of marks.
单项选择题
A．orB．andC．excludingD．including
A．or
B．and
C．excluding
D．including
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