39. After the 1911 Revolution, China began to use the Gregorian calendar (solar calendar) and at the same we have also used the lunar calendar(阴历) in which a leap year (闰年)______ every four years.
A. occurs
B. take place
C. breaks out
D. orbits
(责任编辑:admin)要这答案加QQ:800020900 或加微信:vq800020900 获取