a group of 后面只能接可数名词 比如说: A group of people are on a tour. 一群人在参观 Would you chaperone a group of juvenile detention center inmates on a day trip to the zoo? 你能否陪同青少年感化中心的少年犯去动物园玩一天? A large group of chimpanzees was feeding. 一大群黑猩猩在吃东西. A group of us are going up to London for the day. 我们有些人要去伦敦一天.