Here are the sentences rephrased using the requested verbs:

1. The girl **admitted** that she had eaten all the candies.
2. They **promised** that they would help you.
3. The teacher **reminded** the students to finish their homework before the next class.
4. The driver **asked** the passengers to fasten their seatbelts.
5. The waiter **advised** that red wine was the best option to drink with this dish.
6. He **threatened** that if she phoned him again, he would call the police.