1.I regret to say that I am while to help you
2.To tell you the truth I really regret not helping him
3.It is reasonable to the water pollution to these factories
4.You look very tired.The music will help to relay you
5.He was so selfish that he was very reluctant to help others
6.It remains a question wheather the new medicine has any effect on the patient
7.My mother reminded me not to eat unhealthy food while traveling