单项选择题 W: Am I on the right floor for Mr. Smith’s Office?M: No, it’s on the next floor up, the third floor.Q: Where is the woman now?（）

单项选择题 A．It is a big problem in the management of the city.B．It is a push needed to develop the city.C．It is a cause of disintegration of the city's social structure.D．It is an obstacle to the development of the city.

单项选择题 M: Thanks for returning the book. How did you like it?W: I couldnt put it down.Q: What does the woman think of the book?（）