1. People must learn about keeping the environment ________________ . (pollute) 2. A letter should always end with the ________________ of the writer. (sign) 3. She was ________________ weakened by the long illness she had. (severe) 4. It was really ________________ of you to take that money without asking. (honest) 5. This new film is ________________ good. (exception) 6. My broken leg means I’ll be ________________ to go on holiday with you. (able)

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