The geographical location of a country and its physical【C1】______ are very important to it

s development and【C2】______ . The United States is very【C3】______ in this【C4】______ .

【C5】______ , it has good【C6】______ . In almost every【C7】______ of the country it is possible to live【C8】______ during the whole year. It is true that in the south it sometimes gets very hot and in the north very cold. But the people who live in these regions become【C9】______ to the climate and never【C10】______ much when the weather is either very hot or very cold.

In a large country there is usually a great【C11】______ of different physical characteristics. In the United States, there are wide plains and high mountains, thousands of lakes and rivers of all【C12】______ , cool forests and hot deserts, and a coastline several' thousand miles long.

The many lakes and rivers,【C13】______ he long coastline, have been【C14】______ great importance to the development of the country, since they made possible the easy【C15】______ of the people and all the things people【C16】______ . Ships and boats are still necessary and important. In modem【C17】______ ,【C18】______ , trains, automobiles, trucks and airplanes are doing much of the【C19】______ which was【C20】______ done by ships and boats.

【C1】

A．location

B．character

C．characteristics

D．differences