It seemed incredible that he had been the
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It seemed incredible that he had been there a week already.
A: right B: obvious C: unbelievable D: unclear
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答案：C
题干意为“他已经在那儿一个星期了，这实在令人难以置信。” 句中划线词为形容词，意为“难以置信的”。C项unbelievable意为“难以置信的，不可思议的”；例句：What he said is unbelievable．他说的话实在不可信。A项意为“正确的”,B项意为“明显的”,D项意为“不清楚的”，故选C。