____is one of the four great inventions of ancient China.
He finds_____ really difficult for him to learn English well in just one year.
---Helen is an excellent girl.Everyone likes her.---Yes.Her parents are very _____ of her.
All the students went to the cinema. But____ of them has come back now.
--___________? --She is short with fair hair.
–Have you ever decided to go there? -- No, I haven’t decided_____.