题干
－ you a radio?
－No, I .
A：Are; have; are
B：Do; have; don't
C：Do; has; don't
D：Does; have; do
答案(点此获取答案解析）
B
－ you a radio?
－No, I .
A：Are; have; are
B：Do; have; don't
C：Do; has; don't
D：Does; have; do
，且满足
，则
的最小值是
39元， 
28元。妈妈花了多少元钱？