---- I’m sorry I stepped outside for a smoke. I was very tired. ---- There is no _____ for this while you are on duty.

His _________ estimated at fifty million dollars.

 The key to our success was having the courage to take on any job, and then being creative in our _______ to getting it finished.

____ speaking, a person must care much about his ____, because it is not only a personal thing, but also a social one.

Japan has to employ an increasing number of overseas workers because there is no easy solution to its labor _____.