a America 还是 an America?

a America 还是 an America? I am an America(n) boy.用America还是American? America I come from ____ .I am an ____.应该选England；English还是America；A Is lucy ----?A an English B America C American D an America north of america还是north america. is lucy ----?a.an english b.america c.english girl d.america She is an A_____ girl.是填America 还是American People in America speak() A.America B. Betty is from _____she is an ________girl A:America;American Lucy is an America girl. Q &A about America