单项选择题
A．old age is the worst age B．only old people are able to give wise advice C．a wise old man may live happily D．an old man who has joined in battles can live happily
A．help B．have C．drink D．eat
A．he can’t pay back all the money at the end of a certain period B．he pays back all the money before the end of a certain period C．he has lost his credit card D．he wants to stop using the credit card