How much is this dress It is on sale____20% off.A on B for C at 应填哪个选项
问题描述：
How much is this dress It is on sale____20% off.A on B for C at 应填哪个选项
答
for 选B 这件裙子八折
at 选C 这件裙子两折
我觉得哈
还是B要准确一些。
答
C
答
How much is this dress It is on sale for 20% off.