The parents looked at their college graduate so proud that they seemed to glow with happiness.
The word proud needs to be an adverb because it is modifying looked.
940 MCQ for effective preparation of the test of Adjectives and Adverbs of English Grammar section.
Read the MCQ statement: The parents looked at their college graduate so proud that they seemed to glow with happiness., keenly and apply the method you have learn through the video lessons for Adjectives and Adverbs to give the answer. Record your answer and check its correct answer and video explanation for MCQ No. 347-4626.