她正在考虑邀请谁来参加派对。

She is considering ___whom to invite to the party.

你昨天和谁一起吃晚饭了？

With ___whom did you have dinner yesterday?

昨天和我一起吃饭的朋友是我在旅行时认识的。

The friend ___whom I had dinner with yesterday was someone I met while traveling.