题目内容：

    A long time ago, and still in some countries today, the dollar and penny did not even exist. Actually, trading a cow for two pigs is still the norm (常态) for many cultures. So how is it that we get to use paper and coins?

The biggest challenge for ancient cultures was to have a system that would allow people to exchange products with each other. However, the problem came up when one person was in need of something immediately that they didn’t have a product to trade. For example, a farmer that needed wheat only had fruit to exchange but the fruit wasn’t ready to hand over for another two months. This is what started the idea of a “common currency”. The farmer could buy what he needed with “currency” and just as important, the value of the goods he was exchanging was standardized. He did not have to worry about giving anything in return now or later; his deal was complete. Thus “money” was born.

Over time, each country has developed its own currency and something that might cost 1,000,000 lire in one country might be 1 dollar in the US currency. Most countries also frequently use powerful political people as the “face” of their currency. The US currency is the best example of this. Can you name all the presidents that currently appear on not only paper money but also coins?

The real excitement, however, is the future of how we buy things. People have started to use debit cards (借记卡) that allow you to pay using your bank account rather than cash. That has given way to something called Mondex. Mondex allows you to “wave” your card past any special device that can read these cards. You no longer have to insert, swipe (刷) and then punch in numbers, which could cause security problems.

1.What’s the purpose of Paragraph 1?

A.To introduce the topic of the text.

B.To explain what money was like in history.

C.To tell us that there was no money long ago.

D.To compare the difference between a cow and two pigs.

2.The farmer had an idea of using currency when ________.

A.he had a product to exchange B.he had made a lot of money

C.he had nothing to trade for what he needed D.he would harvest his fruit

3.Mondex is a kind of card which can ________.

A.keep you safe if you are in trouble

B.save you a large amount of money

C.help you trade safely and conveniently

D.make you happy whenever you are bored

4.What does this passage mainly talk about?

A.The evolution of payment. B.The trade in ancient times.

C.The use of money in the world. D.New ways of payment.