在报名参加这次活动之前，所有人都需要经过初步筛选。

Everyone must complete a ___pre-screening before signing up for this event.

在正式面试前，人力资源部门会对简历进行初步筛选。

The HR department does a ___pre-screening of resumes before formal interviews.

所有捐献者在献血前都必须通过健康预筛。

All donors must pass a health ___pre-screening before giving blood.