СРОЧНО  ПОМОГИТЕ!!!!

2 Complete the sentences with the prepositions below.
Around, to, in, from, by, across, througbout,
1. Gold was discovered_______ California
2. Thousands of settlers came____________ the west coast.
3. After 1850 the United States was 3,000 miles ______east ____west.
4. Mail was camed ____ ship the tip of South America
5. The Pony Express Riders rode______ the night.
6. A telegraph line was built ____ the country