I wasn't sure if he was really interested or if he___________polite.

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问题 I wasn't sure if he was really interested or if he___________polite.

选项 A.was just being
B.will just be
C.had just been
D.would just be

答案A

解析句意为我不确定他是真的感兴趣还是仅仅出于礼貌。叙述过去的情况且强调说话人的一种语气,应用进行时态。故选A项。
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