canvass|canvassed|canvassing

在投票之前，我们需要全面考虑所有可能的选项。

We need to ___canvass all possible options before voting.

在投票前，学生们详细讨论了班级旅行计划的几个方案。

Before voting, the students ___canvassed several options for the class trip.

委员会正在详细研究各种可能的解决方案。

The committee is ___canvassing all possible solutions in detail.