题文
The UN charter that had four main purposes operates programmes to help people around the world.
| A．basing on |
| B．bases on |
| C．based on |
| D．is based on |
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The UN charter that had four main purposes operates programmes to help people around the world.
| A．basing on |
| B．bases on |
| C．based on |
| D．is based on |
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