Many people complain of the rapid ________ of modern life.  

Mr．Barret doesn’t think that all bad language should be allowed．In his opinion, there are _____ that should be kept up．

—Sorry , but I can’t visit you tomorrow .—Come whenever it is to your        .

The engineers have rejected the employers' proposals to end the strike and the other workers have come out in _____.

You have to be accurate in this job，because a small mistake can make a big ________.