–Is that the small town you often refer to?–Right, just the one you know I used to work for years.
After Yang Liwei succeeded in circling the earth, Chinese astronauts __________ walk in space.
The man I ______ yesterday in the street is my manager.
Students are encouraged to _________ the design competition for robots at the university.
The plan has to be _______ to meet the real situation.
Have you ever listened to the song Yesterday once more, ________ singer died in her early years?