Why did people put wormwood on the front door ?
A. to memory of our ancestors
B. to make money
C. to repel evil things
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When is Mid-Autumn Festival ?
A. the 15th day of the 8th lumar month
B. August 15th in the calendar
C. full moon day
One of the four great enventions is (造纸术)————
One of the four great enventions is (火药)————
One of the four great enventions is (指南针)————