演讲者用一个有趣的故事结束了讲座。

The speaker ___concluded the lecture with an interesting story.

根据这些数据，我们可以得出结论，这个方法是有效的。

Based on these data, we can ___conclude that this method is effective.

经过多次会议后，两家公司达成了合作协议。

The two companies ___concluded a cooperation agreement after several meetings.