(练习)课时分层作业1 Unit 1 Food Matters-【提分教练】2023-2024学年新教材高中英语选择性必修第一册(译林版2020)

课时分层作业(一)　 Ⅰ.单词拼写 1．The Central Bank has lowered(降低) interest rates by 2 percent. 2．He paused，waiting for her to digest(领会) the information. 3．The labour secretary said the reforms would generate(产生) new jobs. 4．The great advantage of home­grown oranges is their magnificent flavour(味道). 5．Bicycle lanes can relieve(缓解) traffic jam by separating bicycles from cars. 6．Helmets can give cyclists a false sense of security(安全). 7．She laid the baby down gently(轻柔地) on the bed. 8．A baby's need for food can vary(变化) from day to day. 9．The mood(氛围) of the meeting was distinctly pessimistic. 10．The children fell on the food and ate it greedily(贪婪地). Ⅱ.阅读理解 A Remember when your mom told you not to eat too many candy bars or sweets because they can cause tooth decay (蛀牙)? However, it turns out that chocolate can be more salutary to your teeth than you might expect.Recent studies show that chocolate can effectively fight against tooth decay, as if we need another excuse to eat chocolate. Chocolate offers protection like fluoride, a main ingredient in most household toothpastes.Not only does chocolate protect our teeth, but it can do so very effectively.Studies show that chocolate has compounds that provide strong protection for teeth.One of the compounds in chocolate, CBH, is shown to protect even more effectively than fluoride. Tooth decay happens when bacteria work to turn sugar into acids in our mouth.This is why eating foods with high sugar content can lead to more tooth decay.The compounds in chocolate, however, are anti­bacteria and can fight against bacteria in your mouth.The CBH compound in particular also works to strengthen tooth enamel (牙釉质), and protects against tooth decay. Does this mean you can eat as much chocolate as you want without worrying about your teeth? It depends on the types of chocolate that you like.The protective effect of chocolate is most effective when you chew on cocoa beans.Of course, this option is not very appealing to most people.A more tast