A. The open response questions in Duolingo English Test refers to questions such as Listen Then Speak, Write About the Photo, Read Then Write, Speak About the Photo, Read Then Speak and Writing Samples. The responses of test takers will be evaluated by a grading engine. This engine is conditioned to understand your English proficiency just like human rater professionals. This will evaluate your variety and level of grammar, variety of word choice, how much you can write or say in a given time period, grammatical accuracy, level of vocabulary used, etc.