河南成教 / 河南理工大学
正确率：100%
53[单选题]
Much ______been said about the problem but nothing _______ been done so fa
A.has， had
B.had， has
C. had， had
D.have, have
Much ______been said about the problem but nothing _______ been done so fa
参考答案：
佳题速递：