单项选择题In 1066, Britain was conquered by ______.
单项选择题What is not the element in defining language
单项选择题The objective of the Chartist Movement was democratic rights for all men, and it took its name from ______ .
单项选择题If the maxims of cooperative principle is violated, ______ might occur.
单项选择题In recent years, there has been a marked increase in the number of technical terms in the terminology of ______.