单选题 ______ their differences the couple were developing an obvious and genuine affection for each other.

【正确答案】 B
【答案解析】[解析] A项But for意为“倘若没有，要不是”；B项For all意为“尽管”，意同de- spites C项Above all意为“首要，最重要的是”；D项Except for意为“除……以外，除了”。