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.

How about your new book— It won’t be long before it ______.

of the good results of the exam, the teacherfelt very happy

y after suffering from a massive earthquake and toruins, the city took on a new look

The rich man much food the poor families during the hard time.