【单选题】

Like all large cities, New York has old problems to solve and (21) ones to face. Slums(贫民窟) must be cleared, and new housing constructeD、 (22) jams continues to plague(折磨) the city’s overcrowded streets. Not only must new highways be (23) , but old ones must be repaireD、Protecting the (24) and safety of New Yorkers (25) an army of police, firemen, and sanitation(卫生) workers. Finding an adequate water (26) is a constant problem, as is the attraction of new business and industry to boost the city’s (27) .Caring for the sick, (28) the young, providing (29) the needy, and helping newcomers to adjust to big city life are additional tasks (30) the city must perform.

In spite of New York’s (31) , millions of visitors continue to flock to the city each year. Thousands stay to work and (32) in the city, (33) to New York’s human resources. New Yorkers are working hard to (34) their city’s needs and to keep it a world (35) of culture, industry, and commerce. New York buzzes with the sounds of machines tearing down and building up the city, changing its face for tomorrow’s worlD、
A．where
B．how
C．that
D．what