预习
学案: i 单词填空 1. my mother makes sure i have a balanced _____________(饮食)。 2. it is important for everyone to have a good ____________________(生活方式).. 3. to keep _____________(健康的),he takes exercise every day. 4. she writes very carefully and _______________(极少地)makes spelling mistakes. 5. his injury was ______________(疼痛的),so he looked unhappy.