—The experiment had failed. —I suggest you _________ again.
____________wants to stay in a hotel has to pay their own way.
________hard you try, it is difficult to lose weight without cutting down the amount you eat.
Yesterday I ________from the Internet that the environmental organization was ________on March 15,1986.
Reaching this agreement so quickly was a great ________for the meeting.
The man is ________danger to society. Therefore,people around him are in ________danger all the time.