The lift in that tall building went wrong and got trapped _____ floors. People in it had no way to get out.
More and more rich people have promised to ______ their wealth after death to help the poor and the disabled.
Young students are______ not to smoke both in and out of school.
--- Beautiful day, isn’t it? Shall we go out for a picnic? --- ______________!
It’s _____ you do today that will make a difference in your life tomorrow.
Mr. Green showed his students some photos ________ at World Expo 2010 Shanghai.