题文
__________ your attention focused on practicing, and you can reach your goal of becoming an excellent pianist.
| A．Keep |
| B．Keeping |
| C．To keep |
| D．If you keep |
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__________ your attention focused on practicing, and you can reach your goal of becoming an excellent pianist.
| A．Keep |
| B．Keeping |
| C．To keep |
| D．If you keep |
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