选择正确的句子,完成对话。 (5')
A How much is it?
B You may take it for 70 yuan.
C It is too small.
D Can I help you?
E Blue clothes are his favourite.
W : Good 'morning.
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.
W: Look at this pair. Do you like it?
M: Do you have any big pants?
W: Yes. How about this pair?
M :It's nice.
W: 80 yuan.
M : Too expensive. What about 70 yuan?
W:Well. . Here you are.
M : Thanks.