9（）

单项选择题What do we learn from the conversation（）

A．John is not sick.
B．John is feeling better.
C．Jack hasn’t been sick.
D．Jack has not got better.

单项选择题Permanent education is practical because（）

A．there are no limits at all.
B．there are no age limits.
C．no one is getting really too old.
D．no one wants to learn at old age.