我们应该现在出发，否则开会会迟到。

We should leave now, ___or ___else we'll be late for the meeting.

她警告我要完成这个项目，否则我可能会失业。

She warned me to finish the project, ___or ___else I might lose my job.

你需要更努力学习，否则你不会通过考试。

You need to study harder, ___or ___else you won't pass the exam.