英语短文.用恰当的词语天空

英语短文.用恰当的词语天空
A：What do you want to do after graduation?
B：I want______
A：A scientist?______?
B：Because it's very interesting.
A:Don't you think it's too difficult?
B:Yes、but if you put your heart into,nothing is______in the world.And I like______.When I find out a turch by doing experiments,I'm very happy.
A:You're great/Keep trying!
B;______