题干
---How much do you spend_________ the beautiful jeans?
---They _________me 80 yuan.
---They _________me 80 yuan.
A：buying; pay
B：to buy; take
C：buy; spend
D：buying; cost
答案(点此获取答案解析）
D
+1=0}，若
R
，则实数
的取值范围是（ ）