THE GREAT WALL OF CHINA IS THE WORLD’S ___________ STRUCTURE.A. LON...

8. - 500 CAU TRAC NGHIEM THI VAO LOP 6 MON TIENG ANH
500 CAU TRAC NGHIEM THI VAO LOP 6 MON TIENG ANH

8. The Great Wall of China is the world’s ___________ structure.

A. long B. longer C. the longest D. longest