Making friends is not easy. Sometimes it can take years you become true friends with someo

问题补充：

Making friends is not easy. Sometimes it can take years you become true friends with someone.

A. before

B. after

C. because

D. Unless

答案：

(答案→)A. before

B. after

C. because

D. Unless

解析：考查连词的用法。依据第一句“making friends is not easy. 交朋友不容易。”及空格前后句意可推断出“在成为真正的朋友之前会花费好几年。”，故选A。