Between 2010 and 2030, 79 million __________will enter retirement and likely claim Social Security

In the 2012 election, President Obama was the incumbent, and Mitt Romney was the __________

a. challenger b. president-elect c. debater d. delegate

In recent years, Congress has authorized funding to build a(n) _____ along the border between California and Mexico

Fill in the blank(s) with correct word