In this exercise, you will read a given affirmative sentence and select one or more sentences that correctly express the negation of that original statement.
👑C2 - level.proficiency
1. She discovered a novel approach to solving the problem.
⭐B2 - level.upperIntermediate
2. There is an effective solution to the problem.
🚀C1 - Advanced
3. He found the answer to a difficult mathematics problem.