We explored the possibility of expansion at the conference.A offered B included

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问题 We explored the possibility of expansion at the conference.

选项 A offered
B included
C accepted
D investigated

答案D

解析explore是“探索、探险、摸索”的意思,investigate除了常用的“调查”这层意思外,也具有“探索”这样的意义,本句的意思是:在会议上我们探索了扩充的可能性。
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