" is correct. " is incorrect.
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Jeff_MosawyAs I know when we want to asking a question, we should add a do/does/did, right?... when we wan to ask a question ...
For example: What do you think? or What does he think? or What did you think?
Jeff_MosawyAre you sure that "who did write this book?" is incorrect?Do/does/did is not used if an interrogative pronoun is the subject or part of the subject:
Jeff_MosawySo here I have wrote some questions and I hope you guys tell me do all them are correct or not?Terrible!