Stocks in the United States______on Wednesday.A．went upB．went downC．remained stableD．fluct

In 1776, the United States became the first nation in the world ____the word "h

In 1783, the United States and the United Kingdom signed ______ to end the War of Independ

The United States today is the______largest country in size in the world.A．secondB．thirdC．

______ , located in New England, is the oldest city in the United States.A．ChicagoB．Boston

In the United States, the Senate is presided over by______of the United States.A．the presi

In 1900, the United States ranked first in the world in the production of______.A．coalB．el