口语运用。从方框中选择恰当的选项。（每空1分，共5分）

Clerk: Can I help you?
Woman:                        I need a pair of trousers for my daughter.
Clerk:             
Woman: Red.
Clerk: What about this pair?
Woman: The color is OK.            
Clerk: How about this pair? They are short.
Woman: That’s good.           
Clerk: 30 yuan.
Woman: OK.                  Thank you.
Clerk: You are welcome.