问题
选择题
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
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。