1．____ ____ ____ ____ ____（在1845年的秋天）, we ____ ____ ____ （出发）our j

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）

1．In the autumn of 1845; set off for

2．dates back to; content to be so

3．make sense of; distinguish… from

4．are equipped with; adjust itself to

5．provide easy access to; living in poverty