我已经在社区大学报名参加了晚间课程。

I've ___signed ___up for evening classes at the community college.

如果你对其他活动感兴趣，只需在公告板上报名参加。

If you are interested in other activities, just ___sign ___up for them on the notice board.

你应该在研讨会满员前报名。

You should ___sign ___up for the workshop before it's full.