The full name of USD is USD.

dollar

1. Only US dollars can be converted into gold at the price of US$ 35 per ounce. ?

Only dollars can be converted into gold at the price of $35 to an ounce of gold.

2. Japanese investors used to pay high prices for the most luxurious hotels in America. ?

Japanese investors spend a lot of money on high-end hotels in the United States.

The United States has no formal commitment to maintain the dollar value of the world currency. ?

The United States does not formally assume the responsibility of maintaining the dollar value of any other world currency.

The dollar is the monetary unit of the United States. ?

The dollar is the monetary unit of the United States.

The currency of the United States is the dollar. ?

The currency of the United States is the dollar.

6. Dollar coins have never been popular in America. ?

Dollar coins have never been widely used in America.

7. The basic monetary unit in the United States is the dollar. ?

The basic unit of American currency is the dollar.

8. The United States relies on 15 trillion US dollars of foreign debt to run its financial market. ?

The United States borrowed 15 trillion dollars in foreign debt to run the financial market.

9. The U.S. government strongly protests against the economic devaluation that diverted the dollar crisis! ?

Strongly protest against the US government's passing on the economic crisis through the depreciation of the US dollar!