听力资源简介：

light　
(a.)（颜色）浅的

Her eyes are blue and her hair is light brown.
她的眼睛是蓝色，头发是浅棕色。

exchange　
(v.) 退换

Thomas exchanged the coat I bought for him. It was too small.
汤玛士把我送他的外套拿去退换，因为尺寸太小了。