One of the most important mexican exports:
What is this?
How do you call this important part into a factory?
As a result, you get the article:
How much time do you think it takes people to finish a car nowadays?
Let’s see how was this in the past:
What kind of factory do you think is this one?
What area into the factory is this one?
How much time do you think it took people to finish a car in this time?
Rules of writing sentences: