Her results were so poor that all of us were disappointed.
Changes made:
- Changed 'was' to 'were' to avoid subject-verb agreement error.
- Since 'results' is a plural noun, the verb also has to be plural.
- Therefore, we need to use 'were' and not 'was'.
- Added 'so' for correct sentence structure.
- Since the sentence mentions the word 'that', we need to use the word 'so' to ensure that the sentence makes sense and is grammatically correct.
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