--- You know Brad Pitt is already fifty．
--- You are kidding．He doesn’t look ．
A. it
B. this
C. the one
D. that
网友回答
(答案→)A. it
B. this
C. the one
D. that
解析：句意：--你知道Brad Pitt已经50岁了。--你开玩笑，他看起来不像这么大。It指代上文提到的情况，this指代上文的可数名词单数或不可数名词，the one特指可数名词单数，that“那个”，所以选A。