7．
Chris is not a traditional explorer（探險家）-he usually works in an office for a large organization．However，Chris'job can be just as exciting and dangerous as being an explorer．
Chris works for MSF，an organization also known as Doctors without borders （國界）．Since 1971，MSF has sent trained doctors all over the world to help people who have suffered from disasters（遭受災難），such as wars and illness．Chris is a doctor from France who has traveled to many places to organize programs that help people．
At the moment，over 27，00trained doctors have taken part in MSF projects．The organization received the Nobel Peace Prize（諾貝爾和平獎） in 1999．All kinds of doctors can volunteer for MSF．They need to be ready to go to almost anywhere in the world and，of course，they should face difficulties．Most of MSF's work is in Africa．When MSF choose a doctor for a task，they have to go for at least six months．When doctors have completed a few tasks，they might be sent to an emergency（緊急的） task following a disaster，such as an earthquake．
But why would doctors leave a comfortable life and a good pay to join MSF？According to Chris，the experience they have is a great help in their life．What's more，just like the explorers of the past，they need to keep an open mind learn to get on well with the people they meet．One thing that they can say at the end of any task is that they have made a difference to people's lives．
76．MSF's work may be likeA．
A．exciting and dangerous
B．tiring and boring
C．relaxing and colorful
D．peaceful and comfortable
77．The purpose of the organization called MSF is toD．
A．help the poor people to have a rich life．
B．train the doctors to work as a traditional explorer．
C．help volunteer doctors to travel all over the world．
D．help people who suffered from wars，illness or other disasters
78．As a volunteer doctor for MSF，he or she shouldB．
A．have worked in Africa for six months
B．be ready to work for a task for at least half a year
C．have suffered from all kinds of difficulties and disasters．
D．have been sent on an emergency task following the worst disaster．
79．Why would doctors like to join MSF？C
A．Because they can get a good pay．
B．Because they can have a comfortable life
C．Because they can help others and get experience．
D．Because they can travel around the world with their families．
80．Which of the following is TRUE according to the passage？D
A．Chris is an explorer who has organized programs to help people．
B．MSF received the Nobel Peace Prize for helping poor countries．
C．Volunteer doctors make a real difference to their own lives in MSF．
D．MSF offers medical help to people who have suffered from disasters．
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