题文
— How often the Youth Olympic Games ?
— Every four years, like the Summer Olympic Games.
| A．does; hold | B．is; held |
| C．has; held | D．is; holding |
— How often the Youth Olympic Games ?
— Every four years, like the Summer Olympic Games.
| A．does; hold | B．is; held |
| C．has; held | D．is; holding |
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