`1.B`

`->` Xuyên suốt bài nói về tương phản về độ tuổi , cụ thể là " adults - children "

`2.B`

`->` a handsome amount of money `=` a big sum of money : rất nhiều tiền

`3.C`

`->` D/C : This is because they have a special ability .....

`4.C`

`->` They = little children (n ) : trẻ em

`#C365`🐋

27.B 

- Dẫn chứng : Did you ever wonder why it is so difficult for adults to start to learn English or a foreign language ? 

28.B 

- a handsome amount of money = a big sum of money : một số lượng tiền lớn

29.C 

- Dẫn chứng : This is because they have a special ability that helps them learn languages fast

30.C 

- Dẫn chứng : However , little children learn foreign languages without much difficulty . This is because they have a special ability that helps them learn languages fast