—Your sweater looks nice. Is it wool?
—Yes, it is.
A. made of
B. made in
C. made for
D. made from
网友回答
(答案→)A. made of
B. made in
C. made for
D. made from
解析：be made of和be made from都表示“由……制成”，主语为制成品。 1.be made of 表示制成成品后，仍可看出原材料是什么，保留原材料的质和形状，制作过程仅发生物理变化。2.be made from 表示制成的东西完全失去了原材料的外形或特征，或原材料在制作过程中发生化学变化，在成品中已无法辨认。
句意：你的毛衣看起来不错。使用羊毛做成的吗？羊毛做成毛衣发生的是物理变化，故选A。