What are you going to do the future?A. for B. in C. by

问题补充：

What are you going to do the future?

A. for B. in C. by

答案：

解析：for为了，对于；in在里面，指在一个时间空间范围；by通过，到……为止。句意：将来你打算做什么？future属于是时间范围，故用介词in，选B。