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根据句意及首字母提示完成句子。 1. We should take a p ______ examination every year. It's good for our health. 2. He was much a _____ by the sad news. 3. He a _____ some words to explain his idea. 4. I find it f _____ that I can't speak other languages. 5. I didn't r _____ I had made a mistake until he told me.