Though it is the first time they have met they talked as if they friends for many years.

问题补充：

Though it is the first time they have met, they talked as if they friends for many years.

A. are

B. were

C. had been

D. have been

答案：

A. are

B. were

(答案→)C. had been

D. have been

解析：句意：虽然这是他们第一次见面，但是他们谈话就好像是多年的朋友。As if后面的从句如果和事情不符，用虚拟语气，虚拟过去，用过去完成时。选C。