我们正在调查扩展业务的可能性。

We are ___looking ___into the possibility of expanding our business.

如果我们仔细调查这个问题，我们就能找到解决方案。

If we ___look ___into the issue carefully, we can find a solution.

警察决定立即调查这项投诉。

The police decided to ___look ___into the complaint immediately.