The air in Xuzhou is much worse than that in many other cities.We must do______to protect our environment.
— Have you seen the photos ____ I took on my trip? — Yes, I have. They are fantastic.
Mr Wang didn’t imagine ____ a teacher in his childhood.
Tony’s trousers are ____ his twin brother’s. They have the same colour and size.
— Can Tony run very fast? — Yes, he runs faster than ____ in his class.
— One of our ____ will come to stay with us. — Who’s that? — It’s our father’s cousin.