The clock on the bench

The clock case lay open beneath the workshop lamp. At first, I kept my hands behind my back, afraid that one careless touch would scatter the tiny parts. Mara did not begin by naming every wheel. She asked me to turn the stiff key and listen. The mechanism answered with a thin scrape, then silence. On the second attempt, I noticed one tooth catching against the next. By the time Mara passed me the tweezers, I was leaning over the bench, impatient to test my own suggestion.

From the passage, select two words or phrases that show how the apprentice’s response to the repair changes. Explain what each selection suggests.