They became friends again that day , Until then, they        to each other for nearly two years

A．didn’t speak

B．haven’t spoken

C．hadn’t spoken

D．haven’t been speaking

长江上、中、下游经济产业带的核心城市分别是[ ]

A、上海、南京、武汉

B、南京、武汉、重庆

C、上海、武汉、重庆

D、重庆、武汉、上海