根据惧意填写单词。

1. It is less of a problem to be poor than _____ (不诚实).

2. _____ (当心) the person who doesn't talk and the dog that does not bark.

3. You can't wake a person who is _____ (假装) asleep.

4. Don't let yesterday _____ (用尽) too much of today.

5. He who would do great things should not _____ (尝试) them all alone.

中国联通各级维护机构应按照（）、分级负责管理的原则，开展网络设备的运行维护管理和生产工作。