他们预计会在晚餐时间到达机场。

They expect to be ___arriving at the airport by dinner time.

新的解决方案正在形成，正好能满足我们的需求。

A new solution is ___arriving just in time to meet our needs.

经过长时间的思考，我们终于得出了结论。

After much deliberation, we are ___arriving at a conclusion.