B. Discuss the questions in pairs.

(Thảo luận các câu hỏi theo cặp)

1. How can a sick person make other people sick? Think of three ways.

2. The last time you got sick, how do you think you caught the illness?

D. Underline the topic sentence in the following paragraph. Then answer the questions below.

(Gạch dưới câu chủ đề trong đoạn văn sau. Sau đó trả lời các câu hỏi dưới đây)

Although there are several ways to prevent the spread of disease, staying home when you are sick may be the best way. First, when you stay home, the germs in your body are kept in your own room or home only. Therefore, no one at school or at work has contact with your germs. It is also easier to clean your home of the germs than a public place. Moreover, when you are sick, covering your mouth when you cough at the school or workplace may be less effective than staying at home. Some of your germs are still sent into the air when you talk and breathe. Finally, washing your hands after every cough or sneeze may be the least effective way to keep other people healthy. Even with a portable hand sanitizer, it may not be possible to clean your hands that many times in a day and you may also be distracted a lot in doing so.

1. What is the topic of the paragraph? (i.e., What is the paragraph about?)

2. What is the controlling idea? (i.e., What does the paragraph say about the topic?)