According to Krashen,__________refers to the gradual and subconscious development of ability in the first language by using it naturally in daily communicative situations.
题目内容(请给出正确答案)
According to Krashen,__________refers to the gradual and subconscious development of ability in the first language by using it naturally in daily communicative situations.
A. learning
B. competence
C. performance
D. acquisition
