Reality: refers to a language testing tasks and practical language use in characteristics of corresponding task degree.
Test reliability: the reliability of the test or consistency, namely the achievement of examinee, how much of the error was due to the examinee ability outside of the elements that make.
Listening comprehension is a kind of external input information and the listener in the brain contain knowledge experience (including the listener by the master of the pronunciation, vocabulary, and grammar of all language and non-language knowledge) combined with the ability of the final communicative activities
敬请采纳