Do you know this time yesterday?A. what he is cookingB. what is she cookingC. what he was

问题补充：

Do you know this time yesterday?

A. what he is cooking

B. what is she cooking

C. what he was cooking

D. what was she cooking.

答案：

A. what he is cooking

B. what is she cooking

C. what he was cooking

D. what was she cooking.

解析：考查宾语从句。句意：你知道今天他做什么吃的吗？know后面跟着宾语从句，用正常语序，故排除CD两项，根据时间状语yeasterday,故用过去进行时，所以选C项。