试题题干
When children begin their real linguistics development, the beginning of the developing grammar stage varies from two and half to （）years old.
参考答案
正确答案：
试题解析
当儿童开始真正的语言学发展时，语法发展阶段的开始时间从2岁半到3岁不等。
When children begin their real linguistics development, the beginning of the developing grammar stage varies from two and half to （）years old.
当儿童开始真正的语言学发展时，语法发展阶段的开始时间从2岁半到3岁不等。