It seems the roof ______ (leak) for some time. We'd better call

It seems the roof ______ (leak) for some time. We'd better call in the repairman.
【正确答案】：has been leaking
【题目解析】：填has been leaking
中文意思：屋顶漏水好像已经有一会儿了。我们最好叫修理工来。