你想把Li Yan介绍给你的朋友Lisa,你要说:A. Li Yan, this is my friend Lisa. B. Lisa, this is my friend Li Yan.
There _________ a ruler and some pencils in the pencil-box.
That storybook is very _________. The children are _________ in it.
— Is this your shoe? — Yes, it is, but where is _________?
Can you help my child ______ his science ______ Tuesday mornings?
— Is she a bus driver? — _________. She is a postwoman.