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.

There’s a feeling in me _____ we’ll never know what a UFO is-not ever. [ ]

Can you tell me _______- With Lucy’s help.

Some of them are _________ Chinese style.

Would you mind me how this math problem