Upon arriving home from a business trip, dad asked mum about my academic performance at high school and then of my little sister, who was in junior school.
A. one
B. it
C. that
D. the one
网友回答
A. one
B. it
(答案→)C. that
D. the one
解析：考查指示代词。句意：出差一回到家，爸爸就问妈妈关于我高中的学习情况，然后，又问了我上初中的妹妹的（学习情况）。one泛指同类中的一个；it表特指；that指代不可数名词和比较对象；the one特指“那一个”。这里指代academic performance，是不可数名词，用that，故选C。