问一道英语高中题The students were walking in the street ( ).A.in two

选A 固定搭配
三三两两,三五成群地 in twos and threes
扩展一下： by twos and threes 三三两两；两个两个
e。g。The students sit on their seats in the classroom by twos and threes。 中文: 学生们三三两两地坐在教室里。