国家开放大学 / 综合英语（2）
正确率：100%
On being asked to show them some engagement rings the shop assistant first brought out a rather inexpensive selection _ _ _ _ .
a.by mistake
b. on purpose
c.because she forget what they had arranged previously
d.because she thought they did not have enough money to buy what she had prepared for them
a.by mistake
b. on purpose
c.because she forget what they had arranged previously
d.because she thought they did not have enough money to buy what she had prepared for them
参考答案：