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                                    Fill in the blanks:1. Once the potters began to use a wheel, it became possible to make pots in …….. numbers. 2. People started making …………… pots with beautiful designs painted on them. 3. As the scale of production increased, ……….. too expanded with it. 4. Wheeled vehicles like ……….. and ………. were first to come into use.5. It became necessary to keep permanent …… of the expanding trade and growing production. | 
                            
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Answer»  1. large 2. symmetrical 3. trade 4. cart, chariots 5. records  | 
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