Complete the following statements with proper words or expressio

Complete the following statements with proper words or expressions according to the course book.Churl, hussy,wench, villain were originally neutral in color but have all down-graded as 'ill-mannered or bad people'. This example shows that the attitudes of ( ) have also made inroads into lexical meaning in the case of degradation. 
【正确答案】：CLASSES
【题目解析】：本题可从词义变化的原因入手。一般来看，词义变化的原因主要有两个：非语言因素和语言因素。其中非语言因素包括历史原因、阶级原因和心理原因三个部分。Churl（吝啬鬼），hussy（荡妇），wench（少妇），villain（恶棍）原本是中性色彩的词汇，但都被降格为“不礼貌的人或坏人”。这个例子表明，在降格的情况下，阶级的态度也进入了词汇意义。因为在贵族眼里，劳动人民的教养很差，无知愚蠢，行为粗野粗俗。所以，有些词汇就被降格了。