(2011·北京高考)The employment rate has continued to rise in big cities thanks to the efforts of the local governments to increase .
A. them
B. those
C. it
D. that
网友回答
A. them
B. those
(答案→)C. it
D. that
解析：选C 考查代词。根据句意“由于地方政府的努力，大城市的就业率在上升” 可知应用it 指代the employment rate。