30．Rio De Jeneiro has won the right to host the 2016 Olympic Games, and the Brazilians will be occupied in building stadiums　　　 .

　　　 A．as usual　　　　　　 B．on a large scale　　　　　　　　　　　　　　　 C．in return　　 D．in a row

29．As I walked through the town, I was reminded of my childhood.

　　　 A．awfully　　　　　　 B．abundantly　　 C．constantly　　　 D．slightly

28．She gave her husband a full　　　 of her conversation with her doctor.

　　　 A．account　　　　　 B．assessment　　　 C．anecdote　　　　 D．acquisition

27．I witnessed the whole terrible accident, so I was taken to the police station and described it　　　　　 .

　　　 A．at length　　　　　 B．at stake　　　　　　 C．on purpose　　　 D．on end