单项选择题

A． You should avoid graded rivers.
B． You should choose real white water.
C． You should take someone experienced with you.
D． You should choose somewhere like a canal.
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单项选择题
A． Written English.B． Colloquial English.C． Written Arabic.D． Colloquial Arabic.
A． Written English.
B． Colloquial English.
C． Written Arabic.
D． Colloquial Arabic.
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