In this section, we will briefly describe possible ways of reducing the costs and risks __________ in doing this.
| A．involving |
| B．involved |
| C．to involve |
| D．being involved |
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In this section, we will briefly describe possible ways of reducing the costs and risks __________ in doing this.
| A．involving |
| B．involved |
| C．to involve |
| D．being involved |
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