`1`, `B`

`-` Dẫn chứng : " They read books to the people in these place. Sometimes the students just visit them, play games with them or listen to their problems." 

`2`, `C`

`-` Dẫn chứng : " For boys who no longer have fathers, there is a voluntary organization called Big Brothers."

`3`, `C`

`-` Dẫn chứng : " Volunteers belive that some of the happiest people in the world are those who help to bring happiness to others." 

`4`, `A`

`-` Dẫn chứng : " During summer vacations,  they volunteer to work in remote or mountainous areas to provide education for children ."

`-` Tạm dịch dẫn chứng : Trong các kỳ nghỉ hè, họ tình nguyện làm việc ở các vùng hẻo lánh hay vùng núi để cung cấp sự giáo dục cho trẻ em".

`-` Nhưng trong đáp án `A`, thì hàm ý : Tình nguyện viên không cung cấp giáo dục cho trẻ em" `->` Not true.

1. B. Read books, play games or listen to their problems.

2. C. An organization for boys who no longer have fathers.

3. C. Bringing happiness to others makes them the happiest people.

4. A. Volunteers don't provide classes for children.