1. (2019·莲都模拟) 用方框中所给词语的适当形式填空。每词限用一次。

safe           success            except           tidy              twenty

1. （1） One of the keys to business is a careful plan.
3. （2） Jenny has just cleaned the office, so it is very .
5. （3） Passengers are not allowed to talk with drivers for their .
7. （4） The post office is open every day Sundays
9. （5） —Jack, can you tell me your secret of keeping fit?

   —I live on the floor. I walk upstairs instead of taking the lift every day.