下列语言表述得体的一项(　　)

What are you doing under the table —I _____ to find my watch

It’s thirty years since we last met. —But I still remember the story, believe it or not,_______ we got lost on a rainy night.

The buses, _____ were already full, were surrounded by anxious people.

Is that your mother— No, she is my ______, my mother’s sister.