单项选择题
A．Credit cards have more advantages than travellers’ cheques. B．Dollar bills are as convenient as credit cards. C．One-cent coins have been withdrawn from circulation. D．You can increase your credit limit as you lik
A．seldom B．often C．never D．always
A．Some stamps have a flower or animal on one side. B．Along with a picture on one side, there are also some words. C．Some used stamps can be worth a lot of money. D．A stamp, when used, is worth more than a new on