Mr. Li doesn’t think that all bad language should be allowed. In his opinion there are t

问题补充：

Mr. Li doesn’t think that all bad language should be allowed. In his opinion, there are that should be kept up.

A. degrees

B. levels

C. limits

D. standards

答案：

A. degrees

B. levels

C. limits

D. standards

解析：考查名词：A. degrees程度B. levels水平C. limits限制D. standards标准，句意：李先生不认为坏的语言可以允许，他认为应该有维持的标准。选D。