One primary goal of UNESCO is to ______ a modern knowledge society in which all people can participate in information and knowledge.
| A．make up |
| B．polish up |
| C．build up |
| D．give up |
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One primary goal of UNESCO is to ______ a modern knowledge society in which all people can participate in information and knowledge.
| A．make up |
| B．polish up |
| C．build up |
| D．give up |
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