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Cuestionario problem-solving 9

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Negación: lee una oración afirmativa y elige una o más opciones que expresen correctamente su forma negativa.

B2 - level.upperIntermediate

1. He has figured out the best way to solve the problem.

B2 - level.upperIntermediate

2. I believe he can solve the problem.

B2 - level.upperIntermediate

3. She quickly solved the difficult puzzle.