Using mobile phones too much is bad for students' eyes and wastes their time.Đoạn vănGiải thíchGốcĐoạn văn 1Đoạn văn 2Đoạn văn 3Đoạn văn 4🗑✏️abc✅8/20 Using mobile phones too much is bad for students' eyes and wastes their time. True False