某企业决定采用( )，通过提高工作效率、扩大规模、创新技术、降低人工成本、获取低价原材料等手段，以取得行业中的领先地位。

A．差别化战略
B．成本领先战略
C．增长战略
D．收缩战略

That was the first time I _____ there and I was impressed by the friendly people very much. [ ]

A. go

B. was going

C. had gone

D. have gone