I am disappointed because I ________my favourite writer yet.

---- Why does the river smell terrible?
---- Because large quantities of water______．

In the last ten years, they _______ three great scientific experiments.

My house _____ when you visited Beijing last time, so I didn’t invite you to my home.

The old man has retired from the factory. He _____ there for 30 years.

The decorations were so lovely that they _____ in a short time.

—What’s the noise outside?
—Some children_____ hide-and-seek in the yard.

----What do you think of the Chinese language today?
---- Quite popular. It __________ an important role in communicating with other countries. More and more foreign friends are learning Chinese.

- Will you be available at three o'clock tomorrow afternoon?
- No. I ______ a lecture then.

---Have you read any novels written by the famous writer Mo Yan?
--- Yes, of course. I ______ several of his works when I was studying abroad.