Li Ming plays the piano ___ a hobby.
— What nice coffee! — But I think it will taste ______ with sugar.
— What’s wrong with you, sir? — My flight ______ ten minutes ago. What should I do?
It began to rain ______ I was walking in the park.
Turn the computer off, Peter! You ______ play games so late any more.
— ______ you visit Beijing during your holiday?— No. I ______ to Hong Kong.