TheaveragelifeexpectancyoftheRedIndiansis________.

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

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

The average life expectancy of the Red Indians is ________.

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