With an appropriate coordinator or subordinator: (1)Not that I'm

With an appropriate coordinator or subordinator:
(1)Not that I'm unwilling to lend you hand,____ that I'm too busy for the moment.
(2)____ the fire broke out, we were drinking.
【正确答案】：but;When
【题目解析】：【考点点击】本题考查并列连接词和从属连接词。【要点透析】Not..but.是固定结构,意为“不是…而是……”;when引导时间状语从句,与过去进行时态连用时表示过去某个时间正在进行的动作。