Relative Clauses - with determiners and prepositions

Is that the man _ _ she arrived?

Does he know the girl _ _ John is talking?

The person _ _ he is negotiating is the Chairman of a large company.

The tree _ _ they had their picnic was the largest and oldest in the park.

It was the river _ _ the children preferred to swim.

The jungle _ _ the tribe lived was full of strange and unusual animals.

There are five children in this photo, _ _ _ are my cousins.

Here's a picture of several old dolls, _ _ _ was my grandmother's when she was a child.

The woman sitting in this picture is holding two babies. _ _ _ is me!

My sister speaks Korean and Japanese, _ _ _ I find very difficult.