Answer: the contents of a new textbook
Explanation:
The topic that is best suited for a formal discussion is the contents of a new textbook. This is suited to the formal discussion as it relates to educational settings such as a school.
Other options such as the weekend plans of your friends, the best places to shop online for new shoes and the best cookbooks for learning to make Thai food are all informal.
Who is, that's the way they are using it
The correct answer is Sung. it is past tense
The age to drive should not be raised to 21. Sixteen year olds are perfectly capable of driving. They are also in high school and soon to be in college. They should be able to leave and get food as well as drive to practice if they wish to peruse sports. If you are legally mature at the age of 18. Then you should be able to drive since way before the age of 21 at least.