Sample English comprehension passages with answers are available ETS.org, eReadingWorkSheets.com, TestPrepReview.com and K5Learning.com. These sites offer a variety of reading and English comprehension exercises for all levels of comprehension skills, especially grades two through six. The sample passages include a series of multiple choice questions at the end with answers.
TestPrepReview.com gives several sample passages that highlight different components of English comprehension. Each passage is followed by several multiple choice answers to test various facets of understanding of the work. The answers given provide both the correct answer and a detailed explanation and breakdown of how that answer was reached.