Difficulty: Easy
Correct Answer: put in
Explanation:
Given data
Concept/Approach
The idiom is “put in an appearance,” meaning to appear briefly.
Option analysis
put in — correct: “put in an appearance.”put on — to stage/wear.put across — to communicate successfully.put up — to raise/offer accommodation.
Common pitfalls
Choosing “put on” from performance contexts; the fixed idiom is “put in an appearance.”
Final Answer
put in
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