If you _____ her, we _____ out what was happening.[ ]

A. didn’t phone; would never found

B. hadn’t phoned; would never find

C. didn’t phone; would never have found

D. hadn’t phoned; would never have found

古代，中国人称罗马为犁鞬、大秦，而西方人称中国为丝国、契丹。互相对视，但又如隔雾看花，透着神秘和奇异。导致这种现象的主要原因是

A．地理空间的阻隔

B．生产力水平的制约

C．文化传统的差异

D． * * 体制的不同