It was very __________ of you to let us know you were going to be late.

 Only _____ people can have a good understanding of the lecture given by the scientist.

After the final exams, I will have a ___________ vacation in Hainan.

 As a ______ boss, he expected total loyalty and dedication from his employees.

I think you should be          about giving your address to strangers. It might be dangerous.