Unit 1 What’s the matter-八年级下册英语同步分级阅读(人教版)

难度：容易 【语篇来自二十一世纪学生英文报·试题原创】 Take good care of our teeth When people take your picture, they say: “Say cheese! Smile!” So you do—you open your mouth and show your teeth. Healthy teeth help you to look your best. Do you know how to take care of them? Brush your teeth Long ago, when people got older, their teeth would rot away. Rotting teeth give people toothache. To avoid a toothache, people pulled the bad tooth out. Finally they learned that cleaning their teeth was important. But they didn’t have toothpaste then. They tried things such as chalk and lemon juice. About 100 years ago, someone finally made a paste to clean teeth. Not long after that, someone invented the toothpaste tube. That way people could put the paste right onto the toothbrush. Tooth brushing became popular during World War II. The US Army gave brushes and toothpaste to all soldiers. They learned to brush twice a day. Today there are all kinds of toothpastes. Toothpastes come in different colors and flavors. When you choose your toothpaste, make sure it has fluoride. Fluoride makes your teeth strong. Use floss Sometimes your teeth need deeper cleaning than brushing. That is when floss is helpful. You pull it between your teeth, and it reaches places where your toothbrush can’t go. Floss can pull out food that is between your teeth. 【导语】本文主要介绍了牙膏的发展，以及提供了清洁牙齿的建议 单选 1. Long ago, people _____ to avoid a toothache. A. had fake teeth B. brushed their teeth C. pulled the bad tooth out D. used floss 【答案】C 【解析】细节理解题。根据“To avoid a toothache, people pulled the bad tooth out.”可知，很久以前，为了避免牙痛，人们拔掉坏牙。故选C。 2. What did ancient people use to clean their teeth? A. They used toothpaste. B. They used chalk or lemon juice. C. They used floss. D. They used toothbrush. 【答案】B 【解析】细节理解题。根据“But they didn’t have toothpaste then. They tried things such as chalk and lemon juice.”可知，以前人们用白垩（白土粉）或柠檬汁清洁牙齿。故选B。 3. When did tooth brushing become popular? A. About 100 years ago. B. Before World War I.