Question

fix the one word that is used incorrectly.

when you finish eating in a restaurant, you should lie your knife and fork on your plate, not on the table.

Explanation:

The word "lie" is incorrect here because it refers to reclining or being in a horizontal position, but we need a verb meaning to place an object. The correct transitive verb for placing items is "lay".

Answer:

Change "lie" to "lay". The corrected sentence is: When you finish eating in a restaurant, you should lay your knife and fork on your plate, not on the table.