Harvard English series is a training and counseling book that comprehensively includes professional English, and the first batch of junior and senior high school text sub-series is launched. This series inherits the traditional dichotomy horizontally and is divided into three sub-series: cloze, reading comprehension, cloze and reading comprehension.

Vertically, three articles, namely, the article structure, the rule of writing questions and the topic of frequent examination, are closely related in content. Whether it is horizontal or vertical, it can form a perfect trilogy.