我们必须现在就采取行动来阻止这种疾病的传播。

We have to ___act now to stop the spread of this disease.

如果我们作为一个团体一起行动，事情会更容易。

If we ___act together as a group, things will be easier.

政府必须果断采取行动来应对气候危机。

Governments must ___act decisively to address the climate crisis.