072.
Every four years, Americans elect a president. Any American citizen over 35 years old who was born in the US can be president. There are many political parties in the United States, but, two political parties are much stronger than the others. For over a hundred years, the man elected as president has always been either a Democrat or a Republican. During the election year there are a lot of local elections which are called primary elections and held in many of the fifty states. In the primary election which is usually held in the winter and spring, candidates run against members of their own parties. In this way they try to get support of party members around the country. During the summer, both parties have conventions where the party members make the final choice for the party's presidential candidate. Each party chooses a person to run for president and a person to run for vice president. The two candidates work as a team. They will win or lose the election together. Once the final candidates are chosen, they campaign around the country, trying to win votes. The national election is held in November. The candidate who wins becomes president in the following January. The election process is long and costly. Millions of dollars are spent. In dividuals prepare to run for presidency for many years. Nearly all of these people fail to win.

参考答案：
(1) 35
(2) support
(3) national
(4) together
(5) Millions