Look at the notes below. Some information is missing. You will hear a report on E-money. For each question(16-22), fill in the m

Reporter:
    Scientists are developing such kind of smart cards for people to add value to, instead of coins and bills in wallets. We call them chip cards, electric money or e-money. The smart card is like a computer disk or almost a tiny computer. It is a memory device. Scientists intend such smart cards to replace cash in our wallets. Why cards instead of cash or checks? Convenience, safety, and cost. Bills cost money and have to be handled and stored. Besides, the card’s value can be verified and changed without going through a complex system such as a credit card has to. That will finally help smart cards win the favor of all users and in effect become the money of the future.