Difficulty: Easy
Correct Answer: on
Explanation:
Given data
Concept/Approach
In standard English, call on means “to visit (a person).” Call at is used for visiting a place (“call at the office”). Call with is non-idiomatic in this sense; call by (drop by) is possible but far less standard in this structure.
Option analysis
on — correct: “call on you” (visit you). ✅at — used for places, not people.with — unidiomatic here.by — could mean “stop by,” but the natural, taught collocation is “call on (a person).”
Final Answer
on
Discussion & Comments