问题
How is your grandma –She’s fine. She used to_______ TV at home after supper. But now she is used to_____ out for a walk.
A:one and half hours
B:one and a half hour
C:one hour and half
D:one and a half hours;
B:one and a half hour
C:one hour and half
D:one and a half hours;
正确答案是：
