国家开放大学 / 综合英语（1）
正确率：100%
I bought a new house last year, but I _ _ _ _ _ _ my old house yet.
a. did not sell
b. have not sold
c. had not sold
d. do not sell
a. did not sell
b. have not sold
c. had not sold
d. do not sell
参考答案：
佳题速递：