问题
填空题
Krashen uses the ______ hypothesis to explain the relationship between language input and language acquisition and to answer the question of how people acquire languages.
答案
参考答案：input
解析：The input hypothesis： Krashen uses the input hypothesis to explain the relationship between language input and language acquisition and to answer the question of how people acquire languages. 自然法倡导人克拉申提出语言输入假设，该假设解释了语言输入与语言习得直接的关系，并对于人们如何习得语言做出了解释。