1. She referred to the benefits of this work. 2. Those facts were not mentioned in the article. 3. He referred to this event in a conversation with her boyfriend.
1. It referred to the benefits of this work. 2. These facts were not mentioned in the article. 3. He referred to this event in a conversation with his friend.
1. she mentioned the benefits of this work. 2. these facts were not mentioned in the article. 3. he mentioned this event in conversation with her boyfriend.