His drive and persistence were key factors in his promotion.

drive 在这里是名词，意思是"干劲、动力、驱动力"，指一个人内在的推动自己前进的力量。 persistence 是名词，由动词 persist（坚持）加上后缀 -ence 构成，表示"坚持不懈、持续不断"的品质或行为。