选择正确的句子,完成对话 o (5') W : Good 'morning.(1) M: Yes. I'd like a pair of pants for my son. W: Here are the pants. What colour does your son like? M: He likes blue.(2) W: Look at this pair. Do you like it? M:(3) Do you have any big pants? W: Yes. How about this pair? M :It's nice.(4) W: 80 yuan. M : Too expensive. What about 70 yuan? W:Well.(5) . Here you are. M : Thanks.