In the last sentence of the eighth paragraph, "It" refers to In the last sentence of the eighth paragraph, "It" refers to____________. 分类:英语四级 题型:单选题 查看答案
The more than 4,000 adolescents were chosen as the subjects The more than 4,000 adolescents were chosen as the subjects of the study because 分类:英语四级 题型:单选题 查看答案