【正确答案】 1、Lively disagreement and sharpness of argument    

【答案解析】参见第2段第2～4行：Between French friends，who have chosen each other for the agreement of their point of view，lively disagreement and sharpness of argument are the breath of life．But for Germans，that matter of both is regarded as a tragedy．其大意是：对法国人的友情来说，激烈的争执和辩论是至关重要的。而对德国人来说，这些都被认为是悲剧。