题文
Deng Yaping could play ping-pong when she was four.
| A．at the age of four | B．four years later |
| C．for four years | D．four years age |
Deng Yaping could play ping-pong when she was four.
| A．at the age of four | B．four years later |
| C．for four years | D．four years age |
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