下列城市，位于长江干流与其支流交汇处的是（　　）

A．重庆和宜昌

B．重庆和武汉

C．宜昌和南京

D．南京和上海

The first time for everything is always the most exciting one. _____ it is your first day in a new job or going on a first date, you will always remember those “first” times.

A．No matter

B．Whether

C．Either

D．Both