六人已确认他们将参加，十人尚未回复。

Six people have ___confirmed that they will be attending and ten haven't replied yet.

航班应在起飞前48小时确认。

Flights should be ___confirmed 48 hours before departure.

我已经通过电话接受了这份工作，但尚未书面确认。

I've accepted the job over the phone, but I haven't ___confirmed in writing yet.