国家开放大学 / 综合英语（3）
正确率：100%
This process may take _ _ _ _ _ _ _ 15 minutes, Dr. Dexter says, but it has worked for several of his patients.
A.as much as
B. as many as
C.as often as
D.as long as
A.as much as
B. as many as
C.as often as
D.as long as
参考答案：
佳题速递：