Question

...........
The Great Wall of China is unique in the sense ...
Before the Qin dynasty, the wall consisted of
The first emperor of Qin dynasty was responsible for
Two things that make the Great Wall an engineering marvel are: (1) .............
A word that means the same as "huge in size" is .......​

Answer 1

The Great Wall had three major components: passes, signal towers (beacons), and walls.

enormous, immense, huge, vast, gigantic, colossal, mammoth mean exceedingly large. 

Answer 2

Here is your answer

The word meaning same huge in size = Large in size

Hope it helps you...