Read the dialogue below and answer questions there after

Cate:I would like to know if the principal has arrived.

Sudi:He has just landed.

Cate:Whom has he come with?

Sudi:He has arrived with his wife and his son Wanyonyi.

Cate:Has he entered his office?

Sudi:Yes,he and his family have gone in to the office.

Cate:Are they eating?

Sudi:They have eaten.

FROM THE DIALOGUE IDENTIFY THE PAST PARTICIPLE