I don't know the way to do that同义句转换I don't know the way __ __ that

I don't know the way to do that同义句转换I don't know the way __ __ that
I don't know the way to do that同义句转换
I don't know the way __ __ that

I don't know the way to do that同义句转换I don't know the way __ __ that
of doing

I don't know how I should do that.

填of doing

of doing