The purpose of this study is to investigate the effectiveness of response modes by item and feedback type in a web-based language learning program. The subjects of this study, 122 Korean tenth graders learning English as a foreign language, were placed into groups of four and were given a web-based language learning program consisting of two different varieties of item type (multiple choice and constructed response) and two forms of feedback (explicit and implicit). The results of this study suggest that the constructed response mode has a greater effect than the multiple-choice mode on the recall and the transfer of the students' learning. Second, the explicit response mode has a greater effect than the implicit response mode on the recall and the transfer of the students' learning. Third, there is an interactional effect between the item response mode and the feedback response mode in web-based language learning. (Contains 12 tables and 9 figures.)