题目

根据短文内容，补全所缺的单词。    We can see different signs in public places．Sometell us what we should do．This sign is．There is a picture of an animal in the．It tells us to look out for animals．Some signs tell us what we should not do．We should not smoke in the forest．Itstart a fire．That's why we see a "" sign in the forest．Some signs tell us where to go．The bus and underground signs tell us where to find the stations． 答案：【1】signs【2】special【3】middle【4】may【5】No smoking

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