单选题 When he just got off the plane, he gave us a good description of ______ in Afric

A、 A. what he had seenB. that he had seenC. which he had seenD. he had seen what

【正确答案】 A

【答案解析】他一下飞机，就跟我们描述在非洲的见闻。of之后的宾语从句不能用which引导，可排除C，D选项顺序错误，B选项成分不全，因此选A。