【题目】I’m not sure ______ he will win the game or not.
A. that B. if C. why D. Whether
在线课程【答案】D
【解析】
试题分析：考查关系词。句意：我不清楚他是否会赢得比赛。以or not是一个很明显的用关系词whether的标志，表示是否，故选D项。
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