Type the correct preposition for the groups of sentences

• That car belongs _____ my father.
• She is unavailable at the moment as she is attending _____ an urgent issue.
• Can I introduce you _____ my wife?
• Please refer _____ the notes at the end for more information.
• Nobody responded _____ my complaint.
• Please explain the meaning of this word _____ your classmates.

The missing preposition in the sentences above is [ ]

• I totally agree _____ your opinion — everything you say about this is true!
• My secretary will provide you _____ more information if you need it.
• I agree _____ everything you've said.

The missing preposition in the sentences above is [ ]