单选题 Dollars and cents are the basic units of American money. The back of all dollar bills are green (hence "greenbacks"). The commonly used coins are one cent (penny) ,five cents ( nickel), 10 cents(dime),and 25 cents (quarter), 50 cents (half dollar) and silver dollars (not really silver anymore) are gaining in usage, while there has been talk of phasing out the penny that's inflation for you. "Always carry plenty of quarters when traveling. Very useful for phones, soda machines, laundry machines, etc."
There is generally no problem in using US dollars in Canada, but this is never possible in reverse.
It's useful always to carry small change for things like exact fare buses, but do not carry large sums of cash. Instead keep the bulk of your money in travelers' checks which can be purchased both in the US and abroad and should be in dollar denominations. The best known checks are those of American Express, so you will have the least difficulty cashing there, even in out of the way places. Thomas Cook travelers' checks are also acceptable, especially as lost ones can be reclaimed at some car rental companies. Dollar denomination checks can be used like regular money. There's no need to cash them at a bank: use them instead to pay for meals, supermarket purchases or whatever. Ten or twenty dollar checks are accepted like this almost always and you'll be given change just as though you'd presented the cashier with dollar bills. Be prepared to show I.D. when you cash your checks.
Credit cards can be even more valuable than travelers' checks, as they are often used to guarantee room reservations over the phone and are accepted in lieu of deposit when renting a car—indeed without a credit card you may be considered so untrustworthy that not only a deposit but your passport will be held as security too. The major credit cards are VISA, Master Charge and Access, Diners Club and American Express. If you hold a bank card, it could well be worthwhile to increase your credit limit for travel purposes—you should ask your bank manager.

单选题 Why is it useful to carry enough 25-cent coins with you?

【正确答案】 D

【答案解析】短文第1段从第3句开始，就对美国货币体制中各种硬币的用途加以说明。第1段最后一句则集中解释了25美分硬币的特点及其使用的各种方便之处。即Always carry plenty of quarters when traveling．Very useful for phones，soda machines，laundry machines，etc．意即“旅游时，身边总要多带25美分的硬币。打电话、买汽水、付洗衣费等，非常有用。”由上述所说可见本题属于事实细节对号入座题。故选D。

单选题 It is not necessary to carry cash instead of travelers' checks because the latter can be ______.

【正确答案】 B

【答案解析】这道题属于一种反向选择题。注意题句问的是not necessary to carry cash，恰恰与文中的对应句There's no need to cash them at a bank相应。只不过是拐了一个弯似的。该句的后半句更直接地说了“…use them instead to pay for meals，supermarket purchases or whatever”，其中them指代checks。可知支票可以用于支付旅馆和商店的费用，故选B。

单选题 Which of the following certificates do you have to show for cashing your checks?

单选题 The phrase 'in lieu of'(line 2, paragraph 4) most probably means ______.

【正确答案】 D

【答案解析】本题属于同义词语替代题。in lieu of是个拉于语词。在做题时，如果碰到这类词，不要着急，现代英语阅读和写作中，对这类现象的常见处理方法就是紧接着用对应的英语词语进行解释。此处既是破折号后面所说的：use them instead。短文还说，如果没有信用卡出租公司会收取订金还会扣留护照，说明如果有信用卡的话公司就不会另收订金，所以信用卡的作用是代替订金，故选D。