国家开放大学 / 综合英语（1）
正确率：100%
—Are you free this weekend?
—
a. No, it costs about 200 yuan.
b. It shouldn't be that expensive.
c. I'm not sure yet. Maybe not.
—
a. No, it costs about 200 yuan.
b. It shouldn't be that expensive.
c. I'm not sure yet. Maybe not.
参考答案：
佳题速递：