题目内容

Making friends is not easy. Sometimes it can take years      you become true friends with someone.
A.beforeB.afterC.becauseD.Unless
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。
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