Fill in the blanks:
1. The ancient civilization of China developed and flourished in the valley of the ………… river.
2. According to the Chinese tradition, a king named …………….. introduced agriculture, animal husbandry, carts, chariots, boats and clothing in China.
3. Luoyang, Beijing and Chang are among the important cities of ancient ………… .
4. The earliest civilization on the Indian subcontinent is known as ………… civilization.
5. ……………. in Punjab and ……..in Sind are the two sites of the …………… civilization.
