As we all know the Silk Road China to the west in ancient times.A. connects B. connected

问题补充：

As we all know, the Silk Road China to the west in ancient times.

A. connects

B. connected

C. will connect

D. is connecting

答案：

A. connects

(答案→)B. connected

C. will connect

D. is connecting

解析：句意：总所周知，在古代丝绸之路是连接中国和西方的。In ancient times“在古代”，因此要用一般过去式。结合句意，故选B。