Here is a comprehension worksheet to use with Like Water for Chocolate. The first page is strictly comprehension, and the second page focuses on preterite versus imperfect conjugations in context with paragraphs. Keys to both are included.
This worksheet (& key) is part of my Like Water for Chocolate/Preterite and Imperfect Unit. That whole unit is also for sale and includes: vocab list & key, story excerpt with numbered verbs, English/Spanish side-by-side version of the story, comprehension worksheet & key, preterite vs. imperfect worksheet & key, 33 verbs list for identifying preterite vs. imperfect & key, preterite vs. imperfect practice and/or quiz with keys, bingo list with numbers for calling & boards for playing.
You can purchase the whole unit here: http://www.teacherspayteachers.com/Product/Like-Water-for-Chocolate-Como-Agua-Para-Choc-Spanish-Preterite-Imperfect-Unit-1431605