Mr Alfredo came from Mexico city Twenty year ago ,he was emigrant
His first job was in the farm he picked cotton ,tomato and cantaloupes but Mr Alfredo now he is 
neurosurgeon and professor at Johns Hopkins university he is looking for breakthrough in the treatment of
the brain cancer.

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NEW VERSION:

Alfredo came from Mexico city twenty year ago. He was an immigrant.  His first job was on a farm, where he picked cotton, tomatoes and cantaloupes, but  now he is a neurosurgeon and professor at Johns Hopkins University. He is looking for a breakthrough in the treatment of brain cancer.