If the United States were to be the first to release this new means of destruction upon ma

How many terms can a president in the United States be elected to at most？A．1.B．2.C．3.D．4.

If someone is in the United States for good, it means he is there ______.A．to do goodB．tem

People from many countries were drawn to the United States by the growing cities and indus

In the United States,______is claimed to be the birth place and capital city of the "globa

In the United States, a proposal to make a change to the Constitution must first be approv

In the United States, Franklin D.Roosevelt was the only president to be elected more than