问题补充：
What sense do you think will to argue about it?
A. you; do
B. that ; make
C. this ;make
D. it; make
答案：
A. you; do
B. that ; make
C. this ;make
(答案→)D. it; make
解析：句意是：你认为辩论这件事有什么意义？还原的句子是：It makes sense to argue about it. it是形式主语，代替的是to argue about it。
