I give all this background information because I do not think one can assess a writer’s motives without knowing something of his early development. His subject matter will be determined by the age he lives in-at least this is true in tumultuous, revolutionary ages like our own.
考点：assess：评估，评价；motive：动机；determine：决定；tumultuous：（事件，时期）动乱的骚乱的，动荡的
句子结构：because后面接完整的句子。
