7B. Read the following passage and complete the sentences in the box with no more than 3 words. (1) _____________ every day if possible. (动词填原型)(注意句首的单词首字母大写) (2) _____________ after each meal to avoid tooth disease. (3) _____________ with shampoo at least once a week. (4) _________ after going to the toilet, before cooking and eating food. (5) ____________ when they are dirty. (两个单词) (6) __________from other people and cover the _____________ with a tissue or the hand when coughing or sneezing.