The U. S. is determined to do something about its health care system.A．RightB．WrongC．Not m

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

In which way do lower gasoline prices affect U. S. economy？A．It will lead to a little decr

What is the main idea of the passage？A．The White House improves U. S. oil production.B．U.

The key to the industrialization of space is the U. S. space shuttle.【C1】______it, astrona