__________，I think, and you will settle the problem.
| A．So long as you keep up your spirits |
| B．If you make your effort |
| C．Making great efforts |
| D．A bit more effort |
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__________，I think, and you will settle the problem.
| A．So long as you keep up your spirits |
| B．If you make your effort |
| C．Making great efforts |
| D．A bit more effort |
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