Whatever happens, you should keep on what you ____until you are completely successful.

题目

Whatever happens, you should keep on what you ____until you are completely successful.
A.start B.have started
C.had started D.has happened;have lost

答案

选B
翻译：无论发生什么,你都应该坚持你已经开始做的事情,直到成功完成.
开始做的事情发生于keep on之前,但是到此时还没完成,还要继续下去.符合现在完成时的语法规则,因此选择B.