We close friends since we got to know each other in and we always keep in touch.A.

问题补充：

We close friends since we got to know each other in , and we always keep in touch.

A. were

B. have been

C. will be

D. had been

答案：

A. were

(答案→)B. have been

C. will be

D. had been

解析：考查时态。Since自从，其主句一般用现在完成时。

句意：自从我们认识至今，我们仍然是很亲密的朋友，并且一直保持联系。