Mr.Rahman : No, not really. I wish my son became a manager of my shoe-store.
The underlined expression means that …
True answer:
Mr.Rahman wants his son to be a manager
“Mr. Rahman wish his son became a manager of his shoe-store”. Subjunctive “wish”states something that is contrary to what actually happened. while his son Mr. Rahman wants to become a dentist. So expression “I wish my son became a manager of my shoe-store”. Together with expression “Mr. Rahman wants his son to be a manager”.