问题描述：
You can fly to London this afternoon ___you don't mind changing the plane for Pairs.A provided
B unless C except D so far as ,这里是选A,请问“假如”不是用prividing that 和A有什么区别在用法上?
B unless C except D so far as ,这里是选A,请问“假如”不是用prividing that 和A有什么区别在用法上?
问题解答：
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