问题
选择题
Beijing is ranked first in terms of traffic jams and expenses for culture ________ Guangzhou is more open to peasant workers than Beijing and Shanghai.
A．when
B．since
C．while
D．because
答案
答案：C
C 考察连词辨析。意为：北京的交通堵塞和文化消费位列第一，而广州对于农民工要比北京和上海开放。根据语境可知两句之间是对比转折关系，while表示对比，故C正确。