It was ______ of you not to give others a ride in your new car.

From the ________ look on his face, I knew that he must have been threatened by someone.

He was so __________ a key university that he would work until late into the night.

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

With April 18’s railway speedup,highway and air transport will have to compete with_______service for passengers.