小學一年級英語演講我的願望

I have a dream.

I would like to be a scientist in the future， because i want to invent a kind of drug to help people to stay young.

I know what i have to do step by step. Firstly， I have to study very hard to know the basic knowledge. Secondly， i have to participate in different experiments to discover new items. Lastly， i have to insist on my dream until i make it come true.