—There was thick haze(雾霾)in our city this spring.What do you think of it?—I think________cars we drive,________pollution our city will have.
------How can I learn English well? ------__________more speaking and listening.
Nobody except Lily and Lucy _________the park before. Only they can be our guides.
----What’s in your ________ hand? ------Nothing but a coin.
When you go to shows, ________ clean clothes.
To Lihai, the most important thing is _____to win a gold or a silver, _____ to take part.