A．lived onB．depended onC．lived offD．believed inShe has ……

单项选择题Formulated in 1823, the Monroe Doctrine asserted that the Americas were no longer open to European colonization.

单项选择题The number of the United States citizens who are eligible to vote continues to increase.

单项选择题Smoking is not permitted in the office.

单项选择题The train came to an abrupt stop, making us wonder where we were.