A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first line because it introduces the main topic of Dishu's expectancy theory. It gives a broad overview of how the theory is used in a one-on-one approach. It does not refer to any previous information, so it stands alone. Why other lines are not chosen? Paragraph 2 starts with 'It was not designed', which uses a pronoun and cannot stand alone. Paragraph 3 starts with 'Nevertheless', which is a conjunction and needs context. Paragraph 4 starts with 'Everyone', which uses a pronoun. Paragraph 5 starts with 'In his second book', which refers to prior knowledge and cannot stand alone.

Concluding sentence: Why this is the last line? This paragraph is the last line because it wraps up the discussion. It explains the main idea of Dishu's work and gives a conclusion about the effectiveness of his theory.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): The second paragraph connects to the first because it explains a limitation of the expectancy theory. This shows a logical order where the first paragraph introduces the theory and the second paragraph gives more specific information about its design.
• Pair 2 (Paragraph 2 → Paragraph 3): The third paragraph uses 'Nevertheless' to show a contrast. It connects to the second paragraph by explaining what Dishu did despite the limitation mentioned before. This shows a cause and effect relationship.
• Pair 3 (Paragraph 3 → Paragraph 4): The fourth paragraph connects to the third because it shows the result of Dishu's actions. It explains how people reacted to his success, which follows logically after describing what he did.
• Pair 4 (Paragraph 4 → Paragraph 5): The fifth paragraph connects to the fourth because it provides an explanation for Dishu's success. It gives more detail about his theory and how it helped managers and employees, marking a broader to specific strategy.