Task1：

Imagine that you must decide between two homes to live in. One place is very large and is brand new; but it is very far from your place of work or university. The second place is very small and is very old, but you would be able to get to work or university in less than five minutes Which place would you prefer to live in? Explain why

Task2：

The letter writer points out a problem with the math building and suggests an improvement. Briefly describe the improvement and explain the reasons why the woman agrees or disagrees with the letter writer’s suggestion.

Cafeteria for Math Building

Students who are majoring in math spend a lot of time in the math building. I think it would be more convenient for math students if the university turned the large empty room on the first floor of the math building into a small cafeteria Having a cafeteria in the math building would give students a place where they could get something to eat in between classes. Additionally, the university could add a number of electrical outlets to the room so students could recharge their laptops there.

Sincerely, Justin Ruben

Task3：

Explain how the example from the lecture illustrates the concept of a diffusion effect.

Diffusion Effect in Health Studies

When health education experts want to test the effectiveness of a program designed to improve a particular health condition, they often do a study with two groups of people. One group participates in the program, while the other does not： and the researchers compare the two groups to see if the program was effective in improving health. However, if the groups come into contact during the study, a diffusion effect may occur Members of the group participating in the program may mistakenly share information about it with members of the other group This often leads to the results of the study being useless