—What did he say?—I don’t know what.A. did he sayB. he saysC. he has saidD. he said

问题补充：

—What did he say?

—I don’t know what.

A. did he say

B. he says

C. he has said

D. he said

答案：

A. did he say

B. he says

C. he has said

(答案→)D. he said

解析：：考查宾语从句的语序。所以宾语从句中都使用陈述语序，排除A。根据第一句的过去时，可知这里也应该是过去时，故D正确。句意：—他说了什么？—我不知道他说了什么。故D正确。