The most accurate words to fill the spaces would be:
Sugar plantations were the backbone ( source ) of the economy.
In 1890, the US Congress passed the ( McKinley Tariff ), which removed tariffs on all foreign sugar imports.
Hope my answers have come to your help.
Answer:
I assume it's "sordid". Custer and Singleton as people, Hydraulic mining is important but doesn't seem right. Ghost dance is a tradition so it may honestly be Ghost dance or Sordid
On May 14, 1948<span>, David Ben-Gurion, the head of the Jewish Agency.</span>
He can considered as a villain, his action of burning books and burying Confucian scholars alive during his term wasn’t really nice.
The result of a nation exporting more than it imports is the most plausible answer :)