Answer:
He still wants to be a doctor at the end of the story, but he no longer believes that becoming a doctor is an impossibility
Explanation:
just took the test
The annual New York City Marathon is the worlds largest marathon.
Answer: Our future does not exist, just like alien invasions do not exist either.
Explanation: We build our own future, in the present with plans, which will become true if we work hard. Alien invasions can only exist in our mind, just like future only exists in our minds at the present. Do not let your mind be "invaded" by "aliens", invade your mind yourself with amazing plans.