By the mid-_________ the upheava

By the mid-_________ the upheaval in linguistics and psycholinguistics created by Chomsky’s transformational-generative grammar had begun to affect language pedagogy.
A、1940s
B、1950s
C、1960s
D、1970s
【正确答案】：C
【题目解析】：到20世纪60年代中期，乔姆斯基的转换生成语法所造成的语言学和心理语言学的剧变开始影响语言教学。