Excuse me. Is the library open all day — . Only from 8 a.m. to 4 p.m.

Shanghai is much than cities in China.

The police saw the woman _______ a bus and _______ a taxi.

ing to Charles Keeling, the amount of carbon dioxide ________ sharply and steadily over the forty years between 1957 and 1997.

Did you enjoy yourself at the party? –Yes, I’ve never been to ______one before.