You should be       .You mustn't take any unnecessary risks until you are quite sure.  

Wouldn’t it be______for you to pick me up at four o’clock and take me to the airport.

They help and understand each other and never quarrel, thus creating a(n)_______ relationship.

_____ fighting is not allowed in our society, because we love peace and friendship.

Many people think that it is ______ making such an experiment.