The U. S. is the place where people get the best health care.A．RightB．WrongC．Not mentioned

Yellow Stone National Park is （one of) the （older) parks in the U. S. It （was established)

The increase in the U. S. life expectancy is mostly due toA．declining death rates from hea

Which of the following statements is NOT true？A．The U. S. life expectancy is at an all－tim

What is the main idea of the passage？A．U. S. fishing policy is questioned by interest grou

Who is William Cohen？A．The head of a U. S. company.B．A former U. S. defense secretary.C．An

Which of the following details about the news is INCORRECT？A．In the past 10 years, U. S. p