Explanation: The words were chosen based on their grammatical and contextual fit within each sentence. For example, 'COMFORTABLE' describes the experience of traveling by train, 'TAKE' is the correct verb to use with 'a train to the mountains', 'PERSON' fits the context of people choosing trains, 'READ' is a logical activity to do on a train, and 'GOOD' describes the way trains help explore the country.
Note: The original image contained handwritten answers in a table above the text. These were '1', '2', '1', '1', '4' for A, B, C, D, E respectively. However, the task appears to be filling the blanks within the text itself, using the capitalized words on the right as options. The handwritten numbers do not directly correspond to the options needed to complete the sentences grammatically and contextually.