问题
选择题
Dr Yuan makes______ possible______ one-third more of the crop in the same fields.
A．it; produce
B．it; producing
C．it; to produce
D．it; produced
答案
答案：C
本题考查make it possible to do的用法，其他不符合语法结构。make it possible to do 使做某事成为可能。 此处it是形式宾语，真正的宾语是to produce one-third more of the crop in the same fields。