It is _______ that he has been addicted to the drugs and has difficulty quitting it.
Canada is a country ______ many different nationalities as well as one with foreign immigrants ______ the majority of its population.
.--- Where are you, Nancy? --- Here in the sitting room, _______ to Professor Smith.
--- Where will you start your work after graduation? --- Mmm, it’s not been decided yet.I _______ continue my study for a higher degree.
How many more decades will have to pass ____ scientists succeed in providing a cure for cancer?
_______ information cost him many chances of finding jobs.