It was the belief Alex Haley could find his root in Africa made him decide to go to Zambi

问题补充：

It was the belief Alex Haley could find his root in Africa made him decide to go to Zambia．

A． /, which B．which, thatC that ,which D．that , that

答案：

解析：考查复杂句：第一个that引导同位语从句，第二个that是强调句中的，符合这样的结构：It is +被强调部分+that +其它部分 。句意：就是Alex Haley能在非洲找到他的根的想法使他决定去赞比亚。选D。