用a group of 造句.
问题描述：
用a group of 造句.
答
+可数名词
A group of children are playing over there.
答
This is a group of basketball.
答
1、A group of people are on a tour.
一群人在参观.
2、A group of us are going up to London for the day.
我们有些人要去伦敦一天.