1. He is still on the bottom rung of the political ladder.

2. He put his foot on the bottom rung to keep the ladder steady.

3. I started my life on the bottom rung of the ladder in this company.

4. Once Romanov had reached the bottom rung of the fire escape, he ran to a passing tram.

5. It became imperative that he take hold of the bottom rung of the sinuous ladder(Sentence dictionary), which he did.

6. Corporals were at the bottom rung of officers and NCO's but nevertheless had certain duties; literacy was a requirement even for them, though this wasn't always observed, like in the U.S

7. Broughams were the epitome of all that was wrong in Detroit at the time: vinyl tops that promoted rust; wire wheel covers on bottom rung cars; interiors as tasteful as a Las Vegas bordello and in general, promoting luxury on cars woefully short of substance, hardly competitive with European or Asian competitors.