题文
______ different kinds of pianos, the factory is sure they can satisfy people’s need.
| A．To produce |
| B．Being produce |
| C．Produced |
| D．Having produced |
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______ different kinds of pianos, the factory is sure they can satisfy people’s need.
| A．To produce |
| B．Being produce |
| C．Produced |
| D．Having produced |
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