选择题：Much ______been said about the problem but nothing

66题库！
题目内容：
Much ______been said about the problem but nothing _______ been done so far
A.has， had
B.had， has
C.had， had
D.have, have
参考答案：【答案仅供学习，请勿对照自行用药等】

本题答案需会员方可查看！[ 注册 ]或[ 登陆 ]