1.There are three people behind the house.2.The girls in the classroom are Young Pioneers.改错!
问题描述：
1.There are three people behind the house.2.The girls in the classroom are Young Pioneers.改错!
答
1.There are three people behind the house.介词搭配错误 改为：There are three people in the house
2.The girls in the classroom are Young Pioneers.改为：The girls in the classroom are Young Pioneer.