【题目】Though its economy is speeding fast, China's average family income is far below ________ of the developed countries.
A.it
B.that
C.one
D.those

【答案】B
【解析】考查代词。句意：尽管中国的经济发展迅速，但是平均家庭收入还是远低于发达国家。空格处指代的是“average family income”，代指同一事物，并且为不可数名词，故选B项的“that”一词即可。