“邀请者”造句

我不知道被邀请者的确切人数,但不用思索,我认为会有40人左右.
I don't know the exact number of people who have been invited but off the top of my head I should think there will be about forty.

谢谢 您. 谁是您的担保人,或邀请者?
A: Thank you. Who is your sponsor or host?