世界上最长的山脉是（ ）
A：阿尔卑斯山
B：喜马拉雅山
C：安第斯山
D：阿特拉斯山
⑴Can I help you? ____ A. Of course.
⑵Are they OK?____ B. Yes.
⑶Can I try them on?____ C. Thank you.
⑷Here you are!____ D. No. They're too small.
