Tony is twelve old, but his sister is only one old.

Can you come and give us a talk on Thursday or Friday?—I am afraid ______ day is possible. I am very busy these days.

Did the actor live alone in his house? —Yes. He has a wife and two children. But ____ of them lives with him.

_______ good use of learning resources such as the website and library, and you will make great progress.

Attention, coffee lovers! We have for you, the best coffee machine _____ invented.