问题
选择题
Mr. Barret 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
答案：D
Mr. Barret 认为并非所有不标准的语言都可以使用.哪些可用，哪些不可用，应有一定的标准.故选D.
