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    				| 1. | Commercial cities like Harappa and Mohenjodaro were founded in the third milliennium B.C. The civilisation had established commercial connections with Mesopotamia and traded in___________ coloured gemstones , beads , pearls , sea shells , terracotta pots , etc . fill in the blanks by any two items of trade. | 
| Answer» gold , silver , copper (any two). | |