问题
选择题
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
C
题目分析：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。