Question

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

Answer 1

【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：