He did all he could to try to get the car to start ,but it ______ work .
I send you 100 dollars today, the rest _______ in a year.
Taking a plane is the quickest _______ to get to Tibet.
Though he is a(n) _______ worker, he works very hard.
_______ two exams to worry about, I have to work really hard this weekend.
The hospital is _______ tests to find out what’s wrong with the little boy.