题文
Many people __________ the opening ceremony of the 2010 World Expo, which was so amazing.
| A．witnessed |
| B．participated |
| C．swallowed |
| D．handled |
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Many people __________ the opening ceremony of the 2010 World Expo, which was so amazing.
| A．witnessed |
| B．participated |
| C．swallowed |
| D．handled |
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