英语 完成下列对话A:What can I do for you?B:Yes,please.A:I ------ ---

A:What can I do for you?B:Yes,please。A:I __only____ ___want____ ____a___ pen。B:Here you are。A:I like it very much。__HOW_______ __much_______ is it?B:15 yuan。A:Oh,it's too dear。Do you have a ___cheaper_______ one?B:What ____about________ the green one?It's _____cheaper______ than that one。It's only five yuan。A:All right。B:What ___else______ do you want?A:No,_____thanks_________。Goodbye。