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用所给的适当形式填空。 1. Simon said he had a _______( please) journey last week. 2. Every year many _______( tour) come to Beijing to visit the Great Wall. 3. We should work hard at English because it's important in our_______( day) life. 4. It is_______ (possible) for him to finish the work in one hour, because it's very difficult. 5. Don't worry! They can take care of_______( they).