题目

After more than a year of bitter political debate, President Obama sat down in the White House East Room on March 23 and signed the 2010 Patient Protection and Affordable Care Act into law with a pen，and then another pen，and another．Obama used 22 pens to sign the $938 billion health care bill． The practice of using different pens to sign important legislation（法规）dates at least as far back as Franklin Roosevelt．The reason is fairly simple．The pen used to sign historic legislation itself becomes a historical artifact．The more pens a President uses, the more thank-you gifts 5. There are some low buildings the tallest one.   A. from   B. with   C. of   D. around