According to the passage, what was the purpose of examining a sample number of immigrants? A.To compare different age groups B.To detect differences in nationalities C.To confirm different language characteristics D.To measure the use of grammar
Đáp án đúng: A Giải chi tiết:Sentence: "United States between the ages of 3 and 7 performed identically to American-born students. Those who arrived between the ages of 8 and 15 did worse the later they arrived, and those who arrived between 17 and 39 did the worst of all, and showed huge variability unrelated to their age of arrival. "