Only by practising a few hours every day _______ be able to master the language.
—Did Jack come back early last night?—Yes, It was not yet eight o’clock _____ he arrived home.
This is a very interesting book, I’ll buy it,______.
It is difficult for us to learn a lesson in life_________we’ve actually had that lesson.
There were some chairs left over____ everyone had sat down.
The old man has a son and two daughters, ______treating him well, ____makes him sad.