【T1】
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 GON
E.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 VALU
E.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：toobtain
it为形式主语不定式为真正主语所以选toobtain
