this engineer has made a contribution the computer software

问题描述:

this engineer has made a contribution the computer software
this engineer has made a contribution ———the computer software
A.develop B.developing C.to developing D.to develop

to 在这里做介词,介词后面要加 ING 型式
名词后边的to通常是介词,
另外还有一些常用的to作介词的短语要记住;
put forward to .devote to,pay attention to ,refer to ,prefer.to ,turn to ,point to ,see to ,be up to ,object to ,等.
所以答案是:C