The greats walls of china
100

Can you see the great wall of china from space with your naked eye?

Yes / No / Maybe

No

200

What did guards use to send signals in the day?

smoke / fireworks / drums

smoke

300
What is the great wall?


one wall / many connected walls / a tall house

many connected walls

400

while building which food was in the materials

rice/bread/meat

rice

500

How long is it?

Over 21,000km / 15000km / 1cm

Over 21,000km

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