选B
解析：在此句中It作形式主语,提到句子前面来,而明显不能用That或this.故C、D首先排除；而若用that则句子不完整,只有形式主语没有真正主语,所以必须用who,故选B
翻译：谁会赢还是个问题
___ is still a question___ will win.
4个回答
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