国家开放大学 / 综合英语（2）
正确率：100%
You _ _ _ _ _ _ that dictionary yesterday. I have a spare one.
a.need buy
b.needn’t buy
c.needn’t have bought
d.needn’t buy
a.need buy
b.needn’t buy
c.needn’t have bought
d.needn’t buy
参考答案：
佳题速递：