You’re usually such a mild person, but you ______ in a bad mood for the last week.
The new library building _____ last week.
—Did you call Sara back? —I didn’t need to, _____ we’ll have a meeting together tonight.
Keep practicing and you _____ your English.
The air in mountain areas is ____ that in big cities.
Beijing is _____ capital of China and it is _____ city with many places of interest.