The new product was __________ in 2011 and will be put into use in 2012.
| A．found out |
| B．stuck out |
| C．sorted out |
| D．tested out |
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The new product was __________ in 2011 and will be put into use in 2012.
| A．found out |
| B．stuck out |
| C．sorted out |
| D．tested out |
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