去年他成功地从北京大学毕业。
He succeeded in Peking University last year.
Today，sky lanterns （use） at festivals and other celebrations．
The Big Data Expo was held （successful）in Guiyang in May，2016．
If everyone plays a part in saving the earth，the world will be a （good）place．
Father's Day is on the （three）Sunday of June and it's popular in the USA．
Bell invented the telephone by trying many （time）and learning from his mistakes．