1. Wrong: Rob and Connie brought their children to Disney
Better: Rob and Connie brought their children to Disney.
Explanation: A sentence needs to end with a terminal mark.
2. Wrong: Did Dan and Renee really meet when they both worked as EMTs
Better: Did Dan and Renee really meet when they both worked as EMTs?
Explanation: A question needs to end with a question mark.
3. Wrong: I was looking at that website that said, "Jeremy and Kristen take care of fifty pets"
Better: I was looking at that website that said, "Jeremy and Kristen take care of fifty pets."
Explanation: Sometimes people forget terminal punctuation with quotation marks; you shouldn't.
4. Wrong: Mark and Chris and both doctors.They both work in New York.
Better: Mark and Chris are both doctors. They both work in New York.
Explanation: One must put a space after a period. Some word processing programs put this space automatically, but you should not rely on technology. If you're handwriting, leave a space the width of a capital letter after a period and before you begin your next sentence with a capital letter.