234. 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
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(答案→)A. occurs
B. take place
C. breaks out
D. Orbits
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