第7题: [单项选择]Many biologists are critical of the film's ______premise that dinosaurs might one day return. A. scientific B. speculative C. ambiguous D. unwitting 参考答案:B 答案解析:[解析] speculative premise主观臆断。scientific意为“科学的”,意思正好相反,不符合题意;ambitious模棱两可的;unwitting不知情的。故选B项。