- The World Cup_______ once every four years.
- So the next World Cup will be in 2018.
| A．has only held | B．was only held |
| C．will only be held | D．is only held |
- The World Cup_______ once every four years.
- So the next World Cup will be in 2018.
| A．has only held | B．was only held |
| C．will only be held | D．is only held |
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