It _____ have been Tom that parked the car here, as he is the only one with a car.
_____ she is the only daughter of the boss, she started from the lowest position as a common employee.
When the man came in, gun in hand, we all stood there, ________.
Ever since the financial crisis ________, many workers _______from their jobs.
Was it through Li Ning, ________working at a high school, ________you got to know Wangke?
After the new technique was introduced, the factory produced _______ cars in 2010as the year before.