다음 글의 밑줄 친 부분 중, 어법상 틀린 것은?The wave of … | [법원직 9급 영어] 19년 1회차 기출문제 상세 페이지

다음 글의 밑줄 친 부분 중, 어법상 틀린 것은?
The wave of research in child language acquisition led language teachers and teacher trainers to study some of the general findings of such research with a view to drawing analogies between first and second language acquisition, and even to ①justifying certain teaching methods and techniques on the basis of first language learning principles. On the surface, it is entirely reasonable to make the analogy. All children, ②given a normal developmental environment, acquire their native languages fluently and efficiently. Moreover, they acquire them “naturally,” without special instruction, ③despite not without significant effort and attention to language. The direct comparisons must be treated with caution, however. There are dozens of salient differences between first and second language learning; the most obvious difference, in the case of adult second language learning, ④is the tremendous cognitive and affective contrast between adults and children.

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