______the Radio Communications Directory, there are 16,376 licensed radio stations currently broadcasting. A.Due to B.Taken by C.Required by D.According to
A.A.Due B.Taken C.Required D.According
【参考答案】
D 解析：文句中的directory指的是人名地址录、电话号码簿。再从文意上看是说这个directory上记载的......