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【题目】____ the damage is done, it will take many years for the farmland to recover.
A.Until
B.Unless
C.Once
D.Although

【答案】C
【解析】句意:一旦农田被毁坏,将需要许多年的时间才能得以恢复。A. Until 译为到......为止,直到......才,在......以前:B.Unless为如果不,除非:C.once译为一旦,一经便:D.although译为虽然,然而,尽管,结合句意,故选C:

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