The new technology, if to farming, will help increase the grain output.
A. applying
B. to apply
C. applied
D. having applied
网友回答
A. applying
B. to apply
(答案→)C. applied
D. having applied
解析：句意：这个新科技如果被应用于农业，将会增加粮食产量。这里使用了if条件句的省略式，完整的句子应该是The new technology, if t he new technology is applied to farming, will help increase the grain output.当主从句的主语一致的时候，可以省略从句的主语和be动词，所以选C。