It took me a while to complete the exercises. The choices for prepositions was a bit confusing since the word to is a preposition. In the 'passage of the Sun Also Rises' the word to as in to look is part of an infinitive phrase., however.
Perhaps I misunderstood,and the exercise was not calling for a straight verbatim identification of parts of speech, it also requires one to understand the function of the word 'to' in the passage.