Perhaps most puzzling of all, _____ able to make sense of _____ we heard and distinguish the mistakes and errors from “good” language?

1．____ ____ ____ ____ ____（在1845年的秋天）, we ____ ____ ____ （出发）our journey across the continent.

2．Our bond ____ ____ ____ （追溯到，起始于）the time when we were both poor and ____ ____ ____ _____（乐于如此）

3．And, perhaps most puzzling of all, how were we able to ____ ____ ____（搞懂…的意思）what we heard and ____ the mistakes and errors ____（区分） “good” language?

4．Language experts have different answers. Some believe that we ____ ____ ____（具备）a special ability to learn language and that our brain ____ ____ ____（使自己适应） the language we hear around us.

5．Chinese government is also working together with other countries and international organizations to ____ ____ ____ ____（提供便捷简单的方式）hospitals and clinics for low-income families ____ ____ ____. （生活在贫困中的）

Perhaps most puzzling of all, _____ able to make sense of _____ we heard and distinguish the mistakes and errors from “good” language?

 A. what we were, something                    B. how were we, what

 C. why we were, things                        D. why were we, that

Perhaps most puzzling of all, _____ able to make sense of _____ we heard and distinguish the mistakes and errors from “good” language?

A. what we were, something　　 B. why were we, that

C. why we were, things　　　　 D. how were we, what

Perhaps most puzzling of all, _____ able to make sense of _____ we heard and distinguish the mistakes and errors from “good” language?