Interpretation: thin ice

Make sentences:

1 He lives on thin ice.

The ground is covered with a thin layer of ice.

Since accepting this important task, I have been walking on thin ice, and I dare not care at all.

This task concerns the lives of thousands of people. We are walking on thin ice, so how can we be negligent?

5. Premier Zhou once pointed out that building a dam on the Yangtze River is a major event to go down in history, and we should treat this work with trepidation and treading on thin ice.