19. Russia is a country which extends across _____ .
It is always difficult being in a foreign country, __________if you don’t speak the language.
How are you getting on with your classates? ——______. I’ve got to know them all.
We must keep our room clean, for dirt and disease go______, you know.
To their great relief, the missing child returned home, ______, after an absence of two weeks.
Have your working conditions improved? ---No, ______than before, I’m afraid.