四年級英語作文：my dream400字

I want to be a scientist in the future. This is my dream. I must work hard for it. Scientists make great contribution to our society. We have TV, computer, train, plane, planet and many other things because of the hard work of scientists. So I want to be a great person as they are. I want to become an aerospace scientist, because I am interested in the outer space very much. The outer space is wonderful and amazing. It must be great if I can be a scientist of this field.