用所给词的适当形式填空
When do you take ________ (possess) of your new house?
She only got where she is today through hard work and a (drive) dream.
Since its ________ (establish) two years ago, the advice centre has seen over 500 people a week.
We like to think that we are making a positive ________ (contribute) to society.
I'd like to make an ________ (appoint) to see the doctor, please.
The ________ (real) is that there is not enough money to pay for this project.
The study is working toward the ________ (prevent) of cancer.
There will be a ________ (gather) of world leaders in Vienna next month.