We have two spare rooms downstairs, ______ has been used for more than two months.
Jane’s parents suggested that she ______ a medical examination.
I should like to buy a house, modern, comfortable, and ______ , in a quiet place.
If you are _______ about Australian cities, just read the book written by Dr. Johnson.
As is known, mobile phones make it possible for people to ______ each other conveniently.
It is said that the company in ______ charge of him is in_____ debt now.