公共英语考试

【单选题】 Scientists do not know ________.A. how children learn their own languagesB. when children begin to learn their own languagesC. why children learn their own languages

网考网参考答案：A
网考网解析：
[解析] 本题属于推断题。根据文章最后四句话可以推断，A所表述的是正确的。故本题答案为A。 查看试题解析出处>>