问题补充：
What did he say? I don’t know what.
A. did he say
B. he says
C. he said
D. he is saying
答案：
A. did he say
B. he says
(答案→)C. he said
D. he is saying
解析：考查时态。句意：他说了什么？我不知道他说了什么。根据句意说明他说什么事，是在过去发生的事情，故使用一般过去时。
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