I will do something-------for our country中间的空填什么奥?

I will do something_______for our country中间的空填什么奥?这儿还有奥、~我很多都不懂~这是个短文填空in 20 years old，i'm going to be a doctor i think doctors are very great_____often help sick people .they can make them feel better so i am going to study _____from now on .then i will go to 医学院in the future .then i will work in a hospital and_________ something for sick people .i think it's good job for me