For this case we can translate the sentence given as:
Emily: How is your car's gas efficiency?
Francisco: Very good, my car is going __________
The options are:
By definition, efficiency is about obtaining the greatest positive results with the minimum use of resources.
Then, if the efficiency of Francisco's car is very good, then the car is twenty miles traveled per liter of gasoline used.
Emily: How is your car's gas efficiency?
Francisco: Very good, my car is going Twenty km per liter
ANswer:
20 km por litro
Option C
The only thing i would change is the word “ir” into the word “vaya.” it’s grammatically correct. besides that you did a fantastic job!
Mi hermano tiene 5 años y su escuela es grande. Mi escuela es diferente, es pequeña.
I believe it is D.
Hope this is of help to you, and happy studying~!
~{Oh Mrs.Believer}