试题题干
Filling Blanks: You are to fill each blank with ONE appropriate word.
Krashen regards provision of comprehensible 
and reduction of stress as keys to successful language acquisition.
参考答案
试题解析
克拉申认为，可理解性输入和减少压力是语言习得成功的关键。
Filling Blanks: You are to fill each blank with ONE appropriate word.
Krashen regards provision of comprehensible and reduction of stress as keys to successful language acquisition.
克拉申认为，可理解性输入和减少压力是语言习得成功的关键。