2. What topic is introduced in paragraph 1?
举一反三
- Ⅰ. Read the text and find the topic sentence of each paragraph. Paragraph 1: Paragraph 2: Paragraph 3:
- What is the main topic above paragraph? （）
- What is the topic sentence in paragraph 3? （ ）
- What is the topic sentence in paragraph 6 of the report? （ ）
- What is the purpose of writing a topic sentence at the beginning of a paragraph?