neither the past tense verb constituted (in B) nor the present perfect verb have constituted (in C) is correct; both suggest that the statue’s features once constituted an artificial face but no longer do so. Also, B would be better if that were i...
Previous studies have shown that between 25 and 54 per cent of us crack our knuckles – with men doing it more than women. 先前的研究显示,25%到54%的人掰指关节,掰指关节的男...
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