On January 1, 1901, the Commonwealth of Australia was born out of ______ early colonies.

单项选择题Yoknapatawpha was a place invented by ______ in his novels including The Sound and the Fury and Absalom, Absalom!

单项选择题Dr. Martin Luther King, ______, was assassinated in March 1968.

单项选择题Which of the following does NOT characterize a normal patent

单项选择题An inventor can generally make a big profit if he ______ his or her invention.

单项选择题A dead patent is one that ______.