. –Mary, is this ______ umbrella?–No, it’s not mine. It is _______.

Is Peter here yet? ——Not yet, but he ___________ be here soon. He is usually on time.

Is the girl in the red skirt your sister?—No. It _______ be her. She has flown to Australia.

Have you heard of Betty?–Of course, she is a lively child and_______with every one of us.

Wow， your house is so big！—Yes， it’s three times　　　　yours.