阅读下列对话，选择正确的答案。
Mary: Do you have black bags?
Mr Green: Yes, I do.I have black bags, red bags and blue bags.Do you like these?
Mary: Yes,I do.How much are they?
Mr Green: They are thirty dollars.
Mary: Do you have pants?
Mr Green: Yes, I do.These red pants are seven dollars.
Mary: How much are those pants on the table?
Mr G: Seen dollars. And those black pants are twelve dollars.
Mary: I'll take these red pants.
1.They________ white bags.
A. have
B. don't have
C. aren't
D. are have
2. The bags are________.
A.￥20
B. $13
C.￥13
D. $30
3.Mary ________ the bags.
A. like
B. don't like
C. likes
D. doesn't like
4.The black ________ are $12.
A. bags
B. shorts
C. pants
D. shoes
5.Which ones are cheap?
A. The red bags.
B. The blue bags.
C. The red pants.
D. The black Dants.