我们必须现在就采取行动以阻止这种疾病的传播。

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

她不假思索地采取了行动。

She ___acted without thinking.

如果我们作为一个团队一起行动，事情会更容易。

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