读趣百科

A trend that occurs at the same time with the movement to the South and the Weast of the United States is ________.

The largest and smallest states of the United States are ________.

The Mississippi, which is sometimes called ________, has played a vital role in the history of the United States.

Agricltural changes in the late 18th and early 19th centuries in England were so great that they were worthy of the term “ ________ ”.

In the United Kingdom,police officers are not allowed to join ________ or to go on strike.