看图,根据上下文情景完成对话.yangling:hi,helen.how are you?helen:fine,thank you,and you?

看图,根据上下文情景完成对话.yangling:hi,helen.how are you?helen:fine,thank you,and you?
yangling:i am going to buy some postcards.where can i buy them?helen:go to the big____ _____on river road.you will find a lot of postcards here.helen:where should i ____ ____?