Multiple choice

The Great Wall of China is the ______wall in the world.

  1. smallest

  2. highest

  3. largest

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The Great Wall of China is often cited as the largest man-made structure in terms of length and mass, stretching over 21,000 kilometers including all branches. It's not the highest wall - that distinction belongs to various modern fortifications.

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