We _____ live in a small flat but last year we bought a house.
Shangri-la, which is _______ happy home for the local people, is also ________ home to many birds and animals.
--- Hi, Timmy. I’m going to Kitty’s party. --- ________.
The number of people invited ____ fifty, but a number of them ___ absent for different reason.
In order to get good marks, he has changed his attitude ______ study.
There is no ____ that 100 years ago animal testing was cruel, but today animals in experiments are very well taken care of.