分类：教育/科学-外语学习-英语考试
问题：WrittenExpression.1(When)Aresear 
1(When)A researchers checd blood samples of 55 cheetahs from two (samples)B areas of South Africa, they found them (to be)C almost genetically (identity)D.答案说是D(identity)错, 我看B(samples)也错啊.请大家解释一下.2.Because of their (highly developed)A sense (of hearing)B, dolphins are a1(When)A researchers checd blood samples of 55 cheetahs from two (samples)B areas of South Africa, they found them (to be)C almost genetically (identity)D.答案说是D(identity)错, 我看B(samples)也错啊.请大家解释一下.2.Because of their (highly developed)A sense (of hearing)B, dolphins are able to hear a wide range of low and high pitched (sounds)C, including many that cannot be detected by (human)D.答案说是D错,请大家帮忙解释一下
回答： mple要做修饰词不可以是复数。 tectedbyhumans.需要是复数,要和dolphins向对应。