do you know what they were doing this time yesterday 用were对吗

what do you know about the Do you know what c___ the fire Do you know what the answer is? what do you know Do you know what Do you know what? what will you do when you ______(know) the way do you know what's the matter?还是do you know what the matter is?为什么?do you know what's wrong with that?what 是什么成分？主语？ Do you understand the sad heart?What do you know?What I can move you? Do you know what this means?=Do you know the ___ ___this word? What else do you know about the ostrich?什么意思 What else do you know about the12? Do you know what the White House is?如何翻译? What do you know about the American symbols? Do you know what the old man does do you know what（ ）（ cause）the traffic accident Do you know what the wordwheel m_____ in chinese. What do you know about the Olypic Games 翻译