Miss Li ___as a secretary for five years in the company, and now she is general manager of it.
It is generally believed that teaching is ___________it is a science.
Several weeks had gone by____________I realized the painting was missing.
_______________you call me to say you’re not coming, I’ll see you at the theatre.
After she considered the problem, she got a tall box to stand ________.
The changes in the city will cost quite a lot, ___________they will save us money in the long run.