It was not until the 19th century that the newspaper became the dominant pre-electronic medium, following in the wake of the pamphlet and the book and in the company of the periodical.
02译文
直到19世纪，报纸才成为电子时代之前的主流媒体。报纸出现在小册子和图书之后，和期刊同时出现。
03点睛
句中包含it is…that.…的强调句式，被强调的是not until the 19th century这一时间状语，that之后的部分保持正常陈述语序。现在分词短语following...作句子的伴随状语，其中in the wake of意为“紧跟，效仿”，in the company of意为“伴随，陪伴”。
04考点归纳
not until的强调结构有以下两种形式：
*It is not until...that...
It was not until he told me that I knew it
直到他告诉我，我才知道。
*not until置于句首，后面用倒装结构表强调：
Not until he told me did I know it.
直到他告诉我，我才知道。
