Since 1995 people call the Year of the Internet the world has turned flat thanks to the n

问题补充：

Since 1995,people call the Year of the Internet, the world has turned flat thanks to the network.

A. when

B. which

C. in which

D. by which time

答案：

A. when

(答案→)B. which

C. in which

D. by which time

解析：可联系答.案.网客服索取。