A Visit to Lanzhou
A Trip to the Silk Road
Unit 1
group n.
Words and expressions
bridge n.
cross v.  
wide adj.  
cheese n.
<俚> 微笑
群；组；团体
桥梁
横跨；横穿
宽的；广泛的
干酪；奶酪
Words and expressions
go for a walk go down turn left/right lead sb.to sp.in front of take a picture oftake a picture=take a photo
散步沿着……走向左转/向右转带某人去某地在……前面拍……的照片拍照