%0 Journal Article %A BAI Zi-wei %A LI Ke %A YUAN Cai-xia %A WANG Xiao-jie %T Survey on Machine Reading Comprehension %D %R 10.13190/j.jbupt.2019-111 %J Journal of Beijing University of Posts and Telecommunications %P 1-9 %V 42 %N 6 %X In order to make clear the recent work of machine reading comprehension (MRC) tasks, they are divided into four types of subtasks with different sources of answers. They are cloze-style, span selection, multi-choice, and answer generation. Previous work on these four different types of subtasks is investigated under a unified framework of encoder-interaction and reasoning-output. Two types of recent developments for the frame are also given. Several challenges on MRC for future work are discussed at the end of the survey. %U https://journal.bupt.edu.cn/EN/10.13190/j.jbupt.2019-111