由于主演突然生病，剧组不得不重新选角。

The production team had to ___re-cast the main role after the lead actor fell ill.

导演决定更换演员重新排演这部戏剧。

The director decided to ___re-cast the play with new actors.

教授要求我们用不同的方法来重算这些数据。

The professor asked us to ___recast the data using a different method.