I think you’ve got to the point where a change is needed , , you’ll fail .
A. however
B. therefore
C. otherwise
D. besides
网友回答
A. however
B. therefore
(答案→)C. otherwise
D. besides
解析：连词辨析。A. 然而，可是 B. 因此 C. 否则，另外 D.此外，而且。句意：我想你到了需要改变的时候了，否则，你会失败了。故选C。