15. 밑줄 친 부분에 들어갈 말로 가장 적절한 것을 고르시오.
The secret of successful people is usually that they are able to concentrate totally on one thing. Even if they have a lot in their head, they have found a method that the many commitments don't impede each other, but instead they are brought into a good inner order. And this order is quite simple: _________________________. In theory, it seems to be quite clear, but in everyday life it seems rather different. You might have tried to decide on priorities, but you have failed because of everyday trivial matters and all the unforeseen distractions. Separate off disturbances, for example, by escaping into another office, and not allowing any distractions to get in the way. When you concentrate on the one task of your priorities, you will find you have energy that you didn't even know you had.
- 1the sooner, the better

- 2better late than never

- 3out of sight, out of mind

- 4the most important thing first
