So strange were the circumstances of my story that I can scarcely believe myself to have been a party to them.

【正确答案】 A

【答案解析】解析：题干：我故事里的情形非常奇怪，我几乎无法相信我参加了他们的聚会。scarcely几乎不，几乎没有。hardly几乎不；just仅仅，只有；almost差不多，几乎；definitely清楚的，明确的。故答案选B。