英语选择恰当的单词或短语填空

英语选择恰当的单词或短语填空
可以选择的单词：sweaters,how much,color,help,sale,for,thirty,price
1.The shoes in this store are on________.
2.The blue dress is very cheap_______only three yuan.
3.What _______do you want?
4.These flowers are really expensive.They are ______dollars.
5.We have socks at a very good________.