A.to obtain B.made of C.is worth A. it is cheaper 【T1】______ silver B. the coins were actually 【T2】______ silver C. the silver in coins 【T3】______ much more Less than 40 years ago in the United States, it was common to change a one-dollar bill for a dollar's worth of silver. That is because 【T4】______ . But those days are gone. There is no silver in today's coins. When the price of the precious metal rises above its face value as money, the metal will become more valuable in other uses. Silver coins are no longer in circulation because 【T5】______ than their face value. A silver firm could find that 【T6】______ by melting down coins than by buying it on the commodity markets. Coins today are made of an alloy of cheaper metals.

【正确答案】 B

【答案解析】解析：be made of为固定短语，意为“由……所组成，由……造成”，B项意为“硬币实际上是银制的”。

【正确答案】 C

【答案解析】解析：句子缺谓语，C项意为“硬币中银的价值比面值多很多”，所以选is worth。

【正确答案】 B

【答案解析】解析：空格前一句指出，三十多年前在美国，把1美元钞票换成价值1美元的银币是很平常的事情。空格所在句子对这件事情进行解释，所以“当时的钱币确实是银制的”符合文意，选B。

【正确答案】 A

【答案解析】解析：根据空格后的“通过熔化硬币”可知，熔化硬币是为了便宜地获得银，所以选A。