题文
What way do you suppose he had thought of __________ the social problems before he was appointed to work here?
| A．to solve |
| B．solving |
| C．to be solved |
| D．being solved |
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What way do you suppose he had thought of __________ the social problems before he was appointed to work here?
| A．to solve |
| B．solving |
| C．to be solved |
| D．being solved |
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