—Could I smoke here?
—I’d prefer if you don’t smoke in front of the children.
A. that
B. this
C. it
D. you
网友回答
A. that
B. this
(答案→)C. it
D. you
解析：考查代词。I would prefer it if. . . 固定搭配，意为：如果……，我真是太感激了。这里it是形式宾语，if从句是宾语从句，句意：我可以抽烟吗？--如果你不在孩子面前抽烟我就很感激了。选C。