the beatles,____is well know to the world,Africa had contacts with india irom the earliest

首先一句句子中只能有一句主句，那么上面这句句子已经有主句了“Africa had contacts with india irom the earliest”，谓语动词是“had "，所以空格到 remember，只能是从句，“as"是引导非限制性定语从句的词（高中知识点），所以就选D

“as加名词性从句”做the beatles的后置非限定性定语从句，来补充说明主语。