Centre de formation en ligne, expert des métiers du médico-social

This section tests your ability to choose the correct modal verb based on how certain you are about a situation. Couldn’t / Mustn’t The story was so unbelievable it couldn’t Can’t / Might

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: The specific prefix-focused grammar section is available on Scribd - Intermediate Unit 10 Grammar General Answer Key : For variations of this level, check the Unit 10 Test Key

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