2. What has Mary sold? (This is because her old car is bold in the sentence, which means that the question would be asking what was sold by Mary.)
3. Who is writing an email? (This is because Harriet is bold, which means that the question would be asking who was writing the email.)
4. Who like this book? (Joseph is bold, which means that the question is asking who likes the book.)
5. What does Joseph like? (this book is bold, meaning that the question is asking about what Joseph likes.)
6. What did Maya lose? (her ring is in bold, meaning that the question would be asking what Maya lost.)