If I ----plan to do anything I wanted to , I'd like to go to Tibet through as much of it as possibl

If I ----plan to do anything I wanted to , I'd like to go to Tibet through as much of it as possibl
A would,B could,C hav to D,ought to
这题答案是B,为什么不选A?从语法角度讲A也行得通啊
请给详细而准确分析,谢谢
请问如果我译为“如果我将要计划做我想要做的事”这样通不？