试题题干
Fill in each of the following blanks with a word or an expression.
A legitinate, and very important, question for SLA researchers is whether there is a 
route of SLA development.
参考答案
试题解析
对于二语习得研究者来说，一个合法的，也是非常重要的问题是二语习得是否存在一条自然的发展路径。
Fill in each of the following blanks with a word or an expression.
A legitinate, and very important, question for SLA researchers is whether there is a route of SLA development.
对于二语习得研究者来说，一个合法的，也是非常重要的问题是二语习得是否存在一条自然的发展路径。