Food supplies may ________ towards the end of the trip, so we can’t waste any food.

Whoever is_________ to the demanding job will be offered the well-paid one.

“Did you get a job?” “No, I ______, but it’s no use.”

I clean my room once a week, and the job _____ me two hours．

Scientists _______ a lot of experiments on animals, hoping to find and effective way to cure the patients who had AIDS.