China and Greece did not adopt which calendar until the 20th century?

Which Washington, D.C., residence did Harry Truman live in while the White House was renovated? Chimpanzees and gorillas are classified as "great" what? The Chimu people of Peru were conquered by which empire in the 1400s? Chin Ho Kelly, Ben Kokua and Danny Williams were characters on which TV series? In 1900, Chinese fighters attacked foreigners and Christians in which uprising? In a treaty signed on December 1, 1887, China recognized Portuguese rule over which territory? China's Grand Canal connects which two great rivers? The Jianwen and Wanli emperors ruled during which Chinese dynasty, also famous for its porcelain vases?