There _______ a pen on the desk. It is a black pen.

All the villagers _____the fight against thebig flood, _____young and old, men and women.— It’s really very brave of them to do so.

Mr. White, many customers want to see you._______ they wait here or outside?[ ]

It’s said that his father was attacked __________ a dog __________a farm nearby.

She is similar her mother.