Using many symbols makes to put much information on a single map.
A. possible
B. it possible
C. that possible
D. it is possible
网友回答
A. possible
(答案→)B. it possible
C. that possible
D. it is possible
解析：make ＋it ＋adj.＋动词不定式或者宾语从句，此句式中，it是形式宾语，形容词作补足语，真正的宾语后置。